I'd been considering getting an Intel 600 series proc for my next box (which only exists in my mind, bot in any affordable future) bu after reading a shootout between them at Linux Hardware, I'm not so sure.

I like the idea of having both HT and 64-bit on a box, but ultimately 64-bit isn't much of a win (for virtually everything in Desktop-land) but HT is a win and the benchmarks don't address that. So perhaps I'll still keep my options open.