SLI wrote The 1000w G2 is only $5 more expensive than the 750W so I thought why not.

Yeah, fair enough. I'd spend the extra $5 tbh.

IMMERSIVE wrote I would most definately go with the Define R5 over the H440, due to it's minimalistic design, and (imo) better sound reduction. Maybe consider Enermax's Liqtech 240 AIO Watercooler which can be put at the top of the case.

Define R5 is a beauty. When I picked out my case, it was between the H440 and R4 and it was my toughest decision to make on hardware. I decided on the H440 for the PSU shroud and because it matched my rig better. I hear the R5 is a dream to work in and I'd imagine it'd be a quieter case, it also has more room but personally, I wouldn't get it, simply because it doesn't have a PSU shroud. Also, the X61 provides better temps than the LiqTech 240. I'd hold on to the X61.

OP-I'd hella go X99 tbh. It won't benefit you in gaming but dat 6 core tho.