I'm in the market for a new power supply. I'm hoping to SLI my GTX 660 Ti, but I want a better PSU first. I've narrowed it down to one of these two, either the CX750M or the TX750M. CORSAIR CX750M 750W ATX12V v2.3 SLI Ready CrossFir... CORSAIR Enthusiast Series TX750M 750W ATX12V v2.31... I can't really spot any major difference between the two other than the $25 extra for the TX over the CX. Both have the same power ratings.