New
#11
You could add Firewire with a PCI-E X1 card. (The port would be in the rear I/O panel, which can be inconvenient.)
Alternately, why not assemble one yourself? I'm not in the UK, but at amazon.co.uk, a shopping list:
I7-2600k
Asus A8Z68-V Pro
16 GB Corsair Vengeance memory kit (4X4GB)
GTX 560 ti
Gigabyte Triton 180 case (not sure it takes a 9" long graphics card like the 560 ti)
Corsair 600CX power supply
WDC Caviar Black 2TB HD
Microsoft Windows Home Premium X64 OEM
can be had for £1000. (You could go with a cheaper graphics card, if you're not planning on gaming. You might like a nicer case, or a heftier power supply.) You wouldn't get the racy (?) Alienware case, or a system level warranty.