Can't recommend specific model, but the Sony Optiarc drives have never let me down. Solid units.
As for the graphics card, since it's a gaming rig (it is, right? Mainly?) the best thing you can do is plug in the most powerfull card you can afford. At this point I'd just make sure it has DX11, then get whatever is the best bang-for-buck.
SLI/Crossfire, that's up to you entirely. Just be aware that it doesn't work as well or at all depending on the game (should work fine in most cases), so it wouldn't hurt to do a little research on the games you play. It used to be that a multi-gpu setup scaled much better at very high resolutions, but I'm not sure that still holds true.
http://www.tomshardware.co.uk/forum/...crossfire-faqs
I can heartily recommend Sennheiser for headphones.
