At the current moment in time, I am considering just going for the best single-card. I have found after doing research that crossfire tends to run into problems with compatability, and some games do not offer crossfire (or take a while to offer it). Another thing to consider is the fact that most cards I could crossfire/sli would be 1gb cards, which I have seen from benchmarks do not perform well with very high details selected (at least not as well as 2gb+). I am watching the 7970 3GB. As I have heard, more cards should be coming out soon so I'm not rushing into anything.
I have also changed the case to the Paladin 410 because it seems to be an overall better case (in both airflow and design/functions)!