You can still get a 1TB drive, the Samsung Spinpoint F3 is a great drive and roughly £27 less than the WD 1TB (couple £ cheaper than the 500GB too).
Personally would go with the MSI Twin Frozr II 6950
, £5 less with higher factory overclock and 1yr more on the warranty.
I know cases are a personal choice, but I would also check out the Corsair Carbide 500R, great case and £25 less than the NZXT.
By the time Christmas rolls around I would expect prices to come down a bit, probably to the point where you'll be under budget.
Please read through the thread thoroughly before responding.
Nobody wants to read a wall of text, formatting is your friend.
i5 3570k | 8GB G.Skill 1600MHz | R9 290 | SeaSonic 750X