All,
Best to check out some reviews first....
Try: -
www.pcpro.co.uk
www.pcw.co.uk
www.computerbuyer.co.uk
Most magazines run comparions labs and these can give a good indication of which one to buy based on speed, usage, consumable costs etc.
I think one of the above magazines was running a group test this month. Wouldn't do any harm to drop into your local WHS and browse the PC mags...
Regards,
Shuttlebus