Why did you pick that particular card?
I presume it was because of the better cooling, and not for the performance; there are other cards which perform a bit better for a lower price.
How likely is it that you will want a graphics upgrade?
Soon, within 4-6 months, or later?
If you will upgrade soon, it might be better to get a GTX580 or GTX590 now and be done with it.
If you will upgrade after 6 months, kepler and southern islands will be here with 28nm cards.
They will run cooler, faster, and be cheaper to make. It is likely that one of them will be your upgrade at that time.