Good World of Warcraft class guides?

[tallgnome]

I will suggest a couple of websites

www.wowwiki.com Dallinor already suggested will be a very useful guide to most of your needs, suggest you look under this site for rogue talent builds for leveling and later builds. A lot of stats are explained at what they will become and the equations as well.

www.curse-gaming.com for a lot of add ons for wow
I highly suggest quest helper (will look up more when I get home I got a bunch that were nice but just can't remember for rogues)
quest helper - will post points on your map where to go for quests or to kill and once quest is done will return you to the quest giver if you can't help will be really nice for new players ;)

www.wowdb.com easily one of the better wow search engines due to people don't know about it. can navigate through quests or search for gear etc.

www.thottbot.com pretty much the same as wowdb but i prefer wowdb a lot more

To know about what stats are better then what I can go into high detail. addon I dont' remember but you can look them up on curse-gaming and shouldn't be too hard to find an addon to show the pros and cons of changing gear cause I did use one but don't remember what it was called I quit wow months ago but i can look up once I get home.

I could give a small example like what u ask in OP all these numbers are close assumption I don't know the equation but this is a pretty good guess imo.

4 agil vs 6 ap (assuming lvl 20)
6ap only will increase AP and at a low level I think 6AP is like .3 increase to dps
4 agil = 4ap .2increase to dps, increase crit by .28%, increase dodge by by like .2%

So of course 4 agil will easily be more beneficial due to increase to crit and dodge. Of course these mechanics can be looked up on wowwiki

Oh yea to look up weapons at a specific level I would suggest wowdb like above. They have one of the best search engines for wow.

About duel wielding you want a slow main hand and a fast offhand usually but there can be arguments. But if you are asking specifically which weapon like swords, daggers, maces. It really doesn't matter when leveling. Though when I leveled as a rogue I leveled under the combat tree and never used daggers cause of the tree.

Sorry this is all that I can think off the top of my head for not playing in months and also at work where all wow sites are blocked. Though the 4 websites I have mentioned should almost be all the resources you should need till you get to 60-70 then I can give you a few more sites on mechanics of the game.