I used to have a G5, replaced it with a G500, that one died, and replaced it with another G500. I've been very happy with Logitech's top-end mice. Not because they sport a lot of features (which it really doesn't,) it just fits to my hand like a well worn glove. Should have stuck with Logitech.
Also the R4E is only a 8+3 VRM CPU power? I don't understand why everyone thinks that the RoG boards are amazing. I really dig 16 + 2 + 2 CPU power on the P9X79 Deluxe. The only thing I see from the R4E that is different (other than VRMs,) is that quad-fire and quad-sli are supported where on mine only 3-way is supported (despite the 4 PCI-E x16 slots) not that I'm going to be running 4 GPUs anytime soon.