Looks reasonable, but do not count on unlocking cores.
Also, a gaming cpu should have strong per core performance, not a lot of cores.
Most games use two cores, perhaps three. A 6 core cpu is not much good for gaming.
You can get phenom ii quads for a little more than $100. I think it will be well worth it. Geofelt's advice is kinda dated, alot of new games benefit greatly from quad cores and you don't want to be stuck with a dual core. trying to unlock cores is not worth it when the price difference is so small anyway.