Still trying to decide on an SLI-compatible motherboard. I've been looking at the ASUS Sabertooth Z97 MARK S, which looks fantastic and has the best ratings out there, but costs twice as much as the MARK 2 version. A white PCB would be nice, especially with a white case, but why such a high price premium just for appearance and a few extra features? The Mark 2 has excellent ratings on Amazon, but not quite so great on newegg. The MARK 2 from what I understand maintains the same performance and case fan connectivity features that the higher versions have at a much lower cost. The cheaper board still has the traditional black design, but the graphics cards, RAM, and CPU cooler will pretty much cover it up anyway. So will the Sabertooth Z97 MARK 2 be enough? I want to eventually get another GTX 970 for SLI, but in the meantime, run an old GTX 660 as a PhysX card. I would also try for decent overclocks on the CPU when I upgrade the CPU cooler, so overclocking performance is also important.