I personally still think that the GTX470 isn't a good investment. The £40 price premium doesn't bring that much more performance, you might as well just get a GTX460 and overclock that, and you'll be at a similar level. It also means that you can get a cheaper power supply. A quality 500W power supply is plenty for a GTX460 SLI setup.
Now that you have decided on a 1.5TB hard drive, I'd suggest the Spinpoint F3 model.
Now that you have decided on a 1.5TB hard drive, I'd suggest the Spinpoint F3 model.