Im sorry to inform you this but.. AMD is going to discontinue 939 sockets, so go with AM2 if you still don't believe in Intel.
I used to love AMD too. But after C2D, everything changed. Let me show you the difference in power.
I am at 2.6 with opty 165 (can be overclocked to 3.0 but thats about it) and i can only produce about 11k points MAX for folding per month. With daily usage and gaming, i only get about 9k per month. On the other hand, my teammate Franken PC can pump out 18k per month. His computer is dedicated and overclocked well with watercooling but that difference gap is just too huge to not consider yourself a C2D.
I am not sure if my comment is 100% reliable but E6300 should be able to outperform or match X2 3800 overclocked. When E6300 is overclocked, there is no contrast between two.
If you want AMD and its 90nm tech, at least go with AM2 (but AM3 will be released next year i think). 939 is dead technology in 6 month. the production will stop this winter. If you change your mind and wish not to regret not getting an Conroe like me, get C2D.
Please correct me if i am wrong.
Happy december, it is good enough reason to celebrate