I'm not being bias at all.
Can you link to any tests done which show the Phenom II being faster than the Core 2 clock for clock to the extent that warrants him putting down the money for a new motherboard and CPU? If not, then you should understand what I'm saying.
That last one is supposed to be single-threaded performance, but since a 3.5GHz Phenom II X4 just barely loses to a 3.3GHz Phenom II X6, I'm going to presume there's still a small difference being made by more cores? If that's the case, the 3.33GHz Core 2 being faster than both is only more highlighted as having better IPC.
It looks to me like IPC is "roughly similar, but perhaps slightly better on Core 2", which is exactly what I said. I don't know I'm being called bias by stating this as an answer in a thread where the original poster asked about it. I'm not being bias. If anything, I'm being unbiased by telling him not to waste his money on doing a lateral, and instead advising to save for the future.
But hey, maybe you're right. What do I know? Afterall, girls can't overclock, so they probably can't think straight either (I'm joking, don't think I'm mad or accusing you of insinuating that). Maybe he'd be better spending money on a new board, CPU, and RAM (Phenom II) for next to no increase (keeping in mind he's after IPC performance too, not so much more cores), versus a new CPU, board, and RAM (Sandy Bridge or whatever is beyond) for a bigger increase to warrant the money spent. I never would have guessed. Sorry for trying to offer some reasonable advice about a purchasing decision.