quick question. 1. what size images are you working with (very large images need more memory and faster cpu for smooth editing) 2. are you intending to do any intense work (3D cg rendering, high end gaming, etc..) I'll work on a build tonight and if you live in the south of the uk then i can even offer to build it for you
ok this is what i got so far intel i5-3570k (easily overclock-able to 4.5Ghz) 8GB DDR3 ram Nvidia GT630 (lacking in graphical power but fine if your not gaming) 1TB hard drive (7200rpm) Antec one case 600w power supply (a branded one but nothing special as the system even when over clocked will only draw about 250w) DVD dual layer drive z68 motherboard artic cooling freezer 7 pro rev2 (the best budget cooler for the last 3 years)
its a high power cpu lots of ram and a good amount of storage. only downsides are the lack of gaming power and that it cant play blu-rays. parts cost:~£450 pre-built and overclocked(my price):£500 P.S. this is just a first drought based on what you have said are your needs.