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cheap tri-core like 435, cheap quad like the 620 or even dual like the 555BE.
And then with all that cash you've saved, as soon as you feel the need for more power you can grab the newest CPU up to date without paying anything extra.
Exactly. I went for the X3 720 BE, because I wanted to see how far I could overclock it. It's way more power than I need, to be honest. Aside from GTA IV I could have stuck with my 5000+ @ 3.2GHz. Still, I'll be interested to see where all this 6-core stuff leads...