I would NEVER buy a cheap generic PSU. They tend to be overrated, missing protection circuits, and use cheap parts; any of these things make them prone to failure, sometimes without obvious cause, and when they die they may take attached parts with them into the fiery abyss. A quality modern PSU has full range active PFC (no little voltage switch) and some level of 80+ certification for efficiency. Seasonic, Antec, Corsair, XFX, and Enermax/LEPA are among the better brands. OCZ is hit or miss. FSP is okay too. Most Coolermaster is only a notch or so above junk.
Iirc, the cooler you've selected isn't all that great. Frostytech has the best cooler reviews, but HardwareSecrets has been doing a lot of cooler reviews lately as well.
I'm not familiar with that specific one, but recall that some other Gelid Solutions coolers are noisy. Check out Xigmatek, Noctua, and Scythe coolers, or the higher model Corsair coolers. The table and chart on this page may be helpful to you: http://www.hardwaresecrets.com/article/Corsair-H100-CPU...
I bought a Antec High Current Gamer Series HCG-750 750W ATX12V v2.3 / EPS12V v2.91 SLI Certified CrossFire Certified 80 PLUS BRONZE Certified Active PFC Power Supply $99USD + $5 shipping. Has 2of the video card 6 pin and 6+2 pin connectors on separate cables. Extra cables tucked neatly into the far side panel behind the HDD tray.
No need to use Molex to make the extra 6 pin connections.
Depends on your resolution. For up to 1920x1080, Perhaps a single GTX560Ti would be enough, especially if you don't need to have every possible setting maxed on the very latest FPS titles. Or get a GTX570 for a little more cushion.