I would say the GTX is overkill for the reasons being that, by the time you get anywhere near maxing out that card on that resolution, something better and most likely cheaper will be along.
Now, it depends on what you want to do yourself. If you plan on upgrading and so on. But I can't help but feel settling for a 640mb GTS and taking a nice portion of the budget off, would be beneficial both now and in the long term.
The GTX is a very good card, I just think you're looking at buying something that is about to depreciate massively over the first few months of using it. And further still after that.
Raptors are good drives, contrary to popular belief. They're also a good purchase if you're happy to stay within the confines of the capacity as well. After that they can become very suspect as you don't want to pay all that money and run out of space.
I had two 74gb Raptors in RAID0 and I was the first one into any game (Call of Duty, Battlefield 2) and that obviously does have its advantages as a gamer.
My only annoyance with them was the noise - they can be very rattly in a case when they want to be, so if that's important to you, make sure to sound proof it to a decent level and it'll be worth the audio sacrifice.