Never heard of a Titan Z2, but I am getting a Titan Z.
For the SSD its not just about Storage its about R/W and I/O. I'm getting the best one (OCZ R4 1.2TB PCI-E Solid State Disk) PCI-E SSD's are the best to get.
4k Monitors (totally not needed and the top size you'll find on a 4k monitor is 28", Im getting 3 55inch LED Monitors (with really narrow Bezels so its like a 3 sick monitors)
64 GB RAM (covered
i7 Extreme Edition is better then ultimate.
for the overpriced razer gear I say LOL because I aint getting anything Razer, but next year I'm gonna be getting a Christine.
https://pc partpicker.com/user/GeneralBr3tt/saved/2W75