Well, I'd no get a 6800LE at all, it is seriously hamstrung.
Get a 6600GT, or a 6800 NU (such as the BFG 6800 OC). At least in the 6800 NU it is as fast or faster than the 6600GT. And in my case, I could softmod it and I have 16x6 now, so it is a decent amount faster than a 6600GT.