I'd say thats as good as it can get for that setup, is it possible to OC that cpu on the motherboard? as of now it looks like a balanced system and should work fine unless you are expecting unrealistic settings.
there in lies the Rub I can OC this Proc 10 or 15 Percent and keep the temp in the normal range anymore then that and the stock cooler won't hold up and any good coolers that I have used in the past that I would trust are 80 to 120 now.
maybe I could add a second 460GTX those are around 100 bucks now used or refurb.
I just think even with a mild OC the CPU couldn't handle 2 460's