INTEL or AMD ? http://www.cpubenchmark.net/
You have above the link with over 200.000 CPU Benchmarked .and depend how much money do you want to spend on PC. you can choose well from there.
Another link is pricewatch http://www.pricewatch.com/
What CPU is the best for you? dual core? quad core? six core?
If u work with a lot of video you'll need at least quad core, for games is enough a top line of dual core. Intel E 8400 or AMD Phenom II X2 560 Both are the beast .
Usualy, the price for Intel is higher than the AMD
For comparation, the best CPU for Desktop Computers are:
Phenom II 1090T Black Edition Six Core Processor - 3.20GHz, 6MB Cache, 2000MHz is $279 and
Core i7 980X Extreme Edition Processor - 3.33GHz, LGA 1366, 6.4GT/s QPI, 12MB L3 Cache is $999
the top of the line Dual core are: Intel E 8400 with $170Phenom II X2 560 with ~$100 - $110
You must choose wise, depend what do you want to do with PC