I like the XL better because it doesn't end up with smeared fingerprints all over the place that I have to constantly wipe off all the time, and well, the screen is bigger. I don't think the Vita has a better "built" quality, I think it has a more comfortable design to hold, which was a major problem with the 3DS, the XL is a little better since it's bigger but Vita is still better to hold. My problems with the Vita are:

1.) How it's priced after you take into consideration the ridiculous price of the proprietary memory cards at 32GB(it's mind boggling when Class 10 Micro SD 32GB cards can go as low as 19 USD)

2.) The number of actual good games compared to the competition present and in the years to come, If you compare my played time of my DS and my PSP, it wasn't even a competition, and it'd just fall into the same thing again if I get the current Vita. Even if you compare the currently known games, it's really no comparison and it's all about the games at the end of the tunnel. List of Known Vita Games on Wiki, Please update if anybody sees any left out btw, it hasn't been updated since the end of August- http://en.wikipedia.org/wiki/List_of_PlayStation_Vita_games and this is the list of 3DS games- http://en.wikipedia.org/wiki/List_of_Nintendo_3DS_games 

Now, I'm not saying Vita is a bad piece of hardware, I don't even know wtf happened to Sony since the PS2 days and I'm personally an owner of a lot of Sony products. I've played some good amount of Vita since that's what friends are for, but I have no incentive to buy one, it's just not a good value, not ATM anyways.

To me six games (the amount on your list) is probably a pretty good number to buy a system for.

PS1, PS2, PS3 - All first gen, all broken.

PSP, 3000 working fine. PS2 Slim working fine

X-Box 360 first gen broken

X-Box 360 HDMI (Fat) working fine.

NES, SNES, N64, GCN, GBA, GB, DS, all 1st gen all working fine. Also my non first gen GBC, GBP, GBA SP, and Wii are working fine too.

Sony is better then microsoft, but I still say avoid first gen Sony systems. If you haven't had to replace 1st gen Sony's consider yourself lucky because all of them had large scale defects. 1st and second gen PS1's had bad ball bearings which would fall out, 1st gen PS2's had bad lasers (because DVD's were so primitive and expensive) which on average would be replaced after 2-3 years (according to the repair guy), and PS3 had the YLoD. 1st gen PSP's had UMD disk reading issues, 1st gen 360's had the notorious RRoD, and I believe X-Box's had bad lasers too.

Nintendo is king for reliability, they don't produce systems at plants which can't garenteed a <2% fail rate (They are all made at Foxconn, but different plants pay employees differently and turn out different quality products).

I believe first gen PS3's had a 17% fail rate or something like that. Meaning that there was a 17% chance of it breaking before the warrenty period expired. 360 had a 33% fail rate, but judging from my experience with MS, I'm fairly confident that number was closer to 50% (They replaced my broken system with another broken system claiming it was working fine, and won't replace old systems with new ones, but with "functional/repaired" first gen systems).

Anyway, back to the OP - If you don't have a PSP already, get that instead. There is a mountain of good games available for it, it costs less then half the price of PSV, no worries about reliability, and so on. If Nintendo interests you, the 3DS XL is a steal.

this, trust me this guy knows what he's talking about

Of course it is. Buy it and you will surely be happy about it.
Just:
1) Don't get Uncharted. Please.
2) Rayman Origins is one of the greatest platform of all time. So... it's way more than a game that "could be fun". You will love it. Trust me.
3) There is a lot of great games (but be careful of point n.1), you will have your hands full for months.
4) Back to playing Project DIVA ƒ! :]

Don't bother with getting a PSP.. If you get a PS Vita you'll also be able to play PS1/PSP games that is on PSN anyways, as well as crossplay/crossbuy with certain ps3 games. When you look at that value its a win win. It depends on the games you're interested in, and each have their own exclusives.

In terms of game library front, obviously 3ds has more thanks in part of it being out first.

again I recommend Gravity Rush, and Ragnarok Odyssey

Yah, i am an internist (hospitalist)

One thing I really don't get is people banging on and on about if you want it wait til sometime next year to save this guy 50euros or so?. I mean really is 50euros that much that you would want the person to sit at nights for the next 6 months waiting for the price to drop down in the mean time he could be playing games and having entertainment for that time for the extra 50euros.

If you got the cash handy and you got hours where you're waiting with nothing to do go for it, the longer you wait the more hours wasted sitting there at night wishing you had bought it :D

@xwan

Nice. Always cool to see other gamers also in the medical field. I'm a PA.