Appologies if this is in the wrong section, I'm looking to get a new system but i'm having a really tough time choosing my options!

I've got £1500 (ex VAT) to play with.

Do i either:

a) Buy a new Mac Pro with 2GB, upgrade the Video card to an 8800GT, downgrade the processor to a single 2.8GHz Xeon Quad core chip and buy an extra 750GB (a 250 and a 500) HDDs and one 20" monitor

b) Build myself a Core 2 Quad Q6600 overclocked machine with 8GB of RAM, 8800GT, 1TB of storage and two 20" monitors. And have a bit of money left over.

I run Maya a bit of CS3 and edit on Final Cut atm.

What would you guys do in my position?