The 1tb Caviar Black is actually faster by a hair, but its not significant. Platter density is 333gb vs 320 gb, which accounts for the difference between the two drives.
I would change the case as well, CM 690 is great, as is the antec 900. If you want a side window, you can get one for the 690 for less than what you are paying for that thermaltake case. The Nvidia edition of the CM690 comes with it, don't know how you feel about green:
http://www.microcenter.com/single_product_results.phtml?product_id=0292502
Don't get that ram you were looking at, 2000mhz ram won't do any better than 1600mhz in real world apps, the ones Why_Me linked are both good, the OCZ Platinums are good too.
I would swap the GTX 285 in as well, it is less powerhungry, performs better and just $25 more.
If you wanted to SLI later with those GPU's, then get an 850tx instead, the 750w won't be able to handle it I don't think. If you will just use one, then go for the 650tx.
I'd also just get Vista home Premium, Ultimate isn't worth it unless you run a home business or something IMO.
You should definitely get a CPU cooler for this rig, any of the ones Linked by Why_Me would be good. Although if you got the Noctua, I think you can get the LGA 775 version and Noctua will send you the backplate for free I have heard.
Now do you need the Deluxe v2 mobo? The P6T is a very quality mobo too, and if you aren't looking for a high overclock, then the P6T might be a better fit for $40 less. If you are however planning on going SLI in the future, then maybe the Deluxe would be a better fit because of the better board layout. If you can afford the few extra bucks, then go for the Deluxe v2, but if you need to cut some costs you could do it there.