That's a very good build, as it is. I see you've got 750w power supply. Is that for a LIKELY expansion to a 3 monitor set-up. Unless you are seriously thinking of 3 monitors, the GTX680 really isn't worth the price premium, over the GTX670 (assuming it's a decent one). Two 680's in SLi, for a 3 monitor set-up is a sensible option.
If you're not thinking of 3 monitors, stick with GTX670, and drop power supply to 550w. Personally, I'd prefer the MSI Power Ed., to EVGA.
The BEST is probably Western Digital Caviar Black. Probably as reliable as anything, and good warranty. Seagate Barracuda are quite good, performance wise, but have had one or two relability issues, lately. I believe Samsung Spinpoint are quite good, but have no experience of them.
As you're probably going to be running your OS off your SSD (good choice btw, mine just came in today and I'm excited to put it in), you could go for a WD Caviar Green 1TB HDD. I found that Seagate HDD for $89.99 and ended up buying it for the extra storage space I'll need - so maybe check around to see if you can get a better deal than $120. I bought mine at NCIX (Canada) for your reference.
Although, the prices on Newegg are not the best, in my opinion.