I prefer Intel, but being short on money I built an AMD kit. While shopping around my friend being biased to Intel showed me this unbiased site where they test various CPU's and update their results daily. About 3 inches down and on the right you can select the category of CPU's being compared. Very interesting site and will hopefully put some truth to common speculation.
AMD wins the price/performance category. But Phenom II can't keep up with Core i7, so Intel wins when it comes to sheer horsepower. But, I can't complain too much, with my Phenom II X4 940 overclocked @ 3.7GHz. Gets the job done in no matter what I do. And when it comes to gaming, Phenom II keeps up with i7.
i got i7 985 extreme at 3.32ghz (fastest on the market) for the price of 1108$ and my other amd athlon x2 at 2.0 ghz (laptop) and combat arms run as sweet (or almost) then on my intel, but im still for intel, because it can beat almost all amd processors, but this is my first intel, i never got any problem before with AMD and my i7 is quite hot and im worried about that... i got a water cooling system and its still hot, cmon, i never get that problem with AMD!