Need Help Vista 32bit or 64bit

I've read many opions and reviews about vista and i heard them all. I just want some onest opinoins and not some fanboy jibberish. I've been leaning twoards getting 64 bit vista but ive heard that there are problems with it but they have been solved with the SP1 patch. I dont know that becasue obiviously i dont have vista or should i get 32 bit i dont know. I like to play games alot im a typical gamer basically thats all i do with my computer and use the internet so can people inform me on what i should get. I would like to be future proof and get vista so that i could have DX10 i would like that also. But please tell me if vista would jsut be installed and i go to play a game and its all laggy so plzz inform me.

SPEC: Intel Core 2 duo E4500 OC to 2.81GH,8800GTS 512Mb,160GIG Hardrive,2gig of ram