so i'm building my first computer pretty soon and i have just about everything picked out except that i can't decide which way to go with processors: amd or pentium. i've pretty much narrowed it down to the pentium 4 650 prescott (socket LGA 775) or the athlon 64 3800+ (socket 939). i wanna stay under 300 dollars for the processor. what do you guys think? thanks a lot!