I believe I'm buying about half of those on PC when I get around to it I just have to find Gears.  I cannot find it at any local store I swear -_-

I thought that was what made the game so unique though?

Flying a helicoptor as high as you possibly can, parachute out.. Grapple onto a tank just before you hit the ground.. 

Tere are alot of activities you can do besides just the story missions and optional base control battles.

Vigilante 8 has always gone unnoticed it seems I love the series myself I don't really care if the community is dead since I play it local on N64 and PS1 when I can still.

Since I have 1600 points Vigilante 8 is going to take 800 and I'll have 800 left should I go ahead and spend the 5 bucks to get 1200 points to get castle crashers or just get something like splosion man, monkey island, or Castlevania SOTN

I can't in good conscience recommend you anything but Braid. It's an amazing game. Way, way up there for this generation. If you plan on getting it for PC though, then I recommend SOTN if you've never played it. It's also one of the greatest games ever. If you have played it, don't get it just yet. Go for N+, Ikaruga or Castle Crashers, depending on whichever appeals to you more.

I don't have Splosion Man or Monkey Island so I can't recommend them.

Played SOTN who hasn't you know.  Ikaruga is a treasure game and they generally never dissapoint.  I'm downloading Splosion Man demo and I've never had the pleasure of playing a Monkey Island game in my life, though I was going to pick up the PS2 monkey island but like ICO when I finally got my PS2 it was no where to be found.

Braid I might get I played the PC demo I thought it was alright really didn't understand the hype around it, I would pick it up if it were 5 dollars cheaper, I was thinking of waitinf to see if steam ever has a sale on it since they're generally pretty good about that.

Lost Odyssey and Mass Effect...

XBLA Games:

Penny-Arcade 1+2 if they go on sale.  Good adventure/rpg, if you like oldschool (like LucasArts) adventure style

If you enjoy "manager" games, Outpost Kaloki X.  Launch 360 arcade game, but a great timed space station builder.

Castle Crashers online is undeniably awesome.

Obviously, the possibilites are massive.  This is going to sound flippant, but I'm serious: go to the arcade section of Marketplace, and just hit the demos one after another starting with "A".  Even if the games suck, you're out nothing but a half our of playing a free game.

If you really want to stretch the points, check out some of the indie/community stuff.  Far harder to find good amidst the crap, but some gems.  I'd absolutely get Blow, a puzzle game where you have to arrange wind currents to guide a soap bubble around an environment.  Probably close to 100 levels, graphics and music are top notch, multiple game modes, great level design.  Great game.  Carnivale was pretty neat, and I liked Solar (especially for like 200 points).  Again, Demo your ass off.

Actual games:

Echo the Mass Effect and Oblivion if you're into RPGs, and Eternal Sonata.  But again, don't overlook the demo back catalogue.

Oh! and Kameo.  Great game.  To this day I like the cartoony art, great animation, platforming and puzzles, and behind all of that there's the criminally neglected fighting game after the game as well.  If you've got a old-Nintendo Mario thing, you might really like it.

**having said all that**

I don't know your game history, but if you haven't been involved with an all-voice chat game network, I really, really recomend you give it a serious try.  I'm not talking about teabagging in Halo or annoying crap like that, I mean making a run in Horde mode for Gears or the final Standoff in L4D.  Even setting up a Hamburger Hill in GhostRecon.  A friendly race or Cat-n-Mouse in Forza (I'd say get 2 but 3's only around the corner . . ).

You've mentioned that the Halo/Gears/Crap games wer'nt of interest, but give them a serious try in the "non-abbrasive" lobbies.  Heck, send me a message on XBL (busboy33) and I'll get a group of people to just have some fun blowing stuff up, crashing, or whatever.  The effectiveness and transparency of XBL really does make alot of the "not considering" games worth a second look.  It sounds stupid, but XBL really can make just playing the game together more important than what game you're playing, and unfortunately most game that excel at group playing involve guns and are usually associated with jackasses.   

My first recommendation is that you will need far more MS points. Castle Crashers, Braid, and Splosion Man are musts, and I will give strong recommendations to Geo Wars 2, The Maw, Magic: DotPW, and Portal if you haven't already played it elsewhere. Shadow Complex doesn't come out for a few weeks, but I would also save some points for it as well.

Alright used my points on splosion man and Vigilante 8 Arcade. Game wise I'm going to track down Tales of Ves. first after that I'll see if I can get cheap copies of the usual suspects Halo 3, Gears 2, Lost Odyssey, and maybe rent Fable 2.

Seconded.  I would also recommend Bully: Scholarship Edition.  It was super fun and you can no doubt get it really cheap at this point.  As for those MS Points, spend them on Castle Crashers or Braid and you will be a happy boy.