In your opinion which would you say is the better CPU in terms of performance and price ??? AMD Athlon 64 X2 5200 (AM2) OR AMD Athlon X2 255 (AM3)
There's no Athlon X2 255. It's the Athlon II X2 255. But the answer is undoubtedly the AMD Athlon II X2 255. You can compare their specs here -> Tech ARP - Desktop CPU Comparison Guide Rev. 8.9