Chassis upgrade

I'm doing a bit of an upgrade on the metallic bits of my main rig.

I've upgraded the CPU, MB, GPU and RAM in December, but I couldn't be arsed to pick out any other new bits. I wasn't interested in overclocking and mostly went for bang-for-the-buck components. The rig is for gaming and software development, but mostly gaming since I have an awesome laptop for the dev part. It's an i7 4770, Gigabyte H87-HD3, Gigabyte GTX 760 OC WindForce 3X 2GB.

I've been growing increasingly bothered by the noise and general appearance of the whole thing, so I decided to get off my lazy ass and build it right.

After some market research (I live in Romania, where availability is scarce for certain brands and prices are anywhere from 20 to 100 percent higher than in the US), I've come up with some pretty clear ideas, but I would appreciate a bit of help in some of the choices, and maybe comments regarding the other choices. Here goes.

PSU: Corsair RM750 - is this ok? It's 80+ Gold and seems like the best choice in this price range (I may add another GPU at some point)

Cooling: Corsair H75 or H80i? I'd really like to go liquid for aesthetics and space. The Noctua NH-D14 is just too big. Custom loop is out of the question.

Thermal Grease: Arctic Cooling MX-4 or Arctic Silver 5? (could not find IC-Diamond or any other "boutique" stuff)

Case: Fractal Design Define R4 Titanium

KB: Corsair K70 Red Switches. I'd like to go for Browns, but I could only find some CM Storms with browns and they don't look all that great.

I realize that without OC the cooling is a bit overkill, but I really want to stay in a low temp range and the rig will need to run in full load in ambient temperatures of around 30C sometimes.

I'm also building a NAS regarding which I have some concerns, but I'll ask that separately.

Cheers.

An RM 550 will run that system just fine.  If you go with 750w; your fan wont have to ramp up as much, though.

H80i would be my pick.

AS5 will be a couple degrees cooler, but is conductive.  MX-4 is more applicable since its non conductive.  The pre applied thermal paste on the corsair aio will be fine, though.

everything else looks fine.

Thanks for the feedback. I went for the H80i and the stock paste in the end.

Actually I went for 2x H80i by mistake :)) (I tend to go through checkout very quickly so that I don't have time to change my mind and it looks like I added it to the basket twice). Hopefully the refund process will be painless.