Not sure whether you can sacrifice 2Gb of ram, as motherboards have only 4 ram slots so you have to buy two 2x2Gb kits to fill up all 4 slots.  Wish the new motherboards had 8 slots like the motherboards from the days of DOS.  (Yes - you could go for a server board - and toss all frugality out the window.)

The Intel Q6700 is almost double the price of Q6600.  You'd be better off investing a few bucks in a better cooling solution and do a mild overclock to get the same performance as the Q6700.  For VUE, best to go for stability when you have a choice between speed or stability.

Right now, the best "bang for the buck" is the Intel Q6600.  Wait a few months, and things will change (as always).