I just think that Phenom II X4 is not such a great value compared to Athlon II X4 because PII is really not that much faster and it is considerably slower than the Core i5/i7 chips.Phenoms are simply faster
But the X6 is a pretty great value if you can use all those cores. X6 has Turbo too so it's not bad for even less threaded tasks. Intel wants some serious money for their 6 core whereas poor AMD is shipping theirs under $200 (can't be making much money there.)