what parts of it should I spend the most money on?
Let's say my budget is £850. What could I get?
Quadcore AMD, 4GB RAM, Nvidia 8800GT graphics card, Firewire card, 2x500gb sataII hard drives, 2x20inch wide screen monitors. Basically, you can get a decent specced editing system for a fair bit under the £850 provided you dont feel the need to have a dedicated capture card. Thats my system specs, and it works a treat burning both DVD and Bluray.