How does this look guys?
http://img254.imageshack.us/img254/7417/specdi4.jpg[img][/QUOTE]
If you drop the second case then you should be pretty close to the budget.
I'd change the hard drive to the Hitachi 160gb as it only costs about a quid more but offers double the space.
I'd agree with Duke about the monitor.
Finally is there any real reason for going with 32bit Vista? I don't see any major benefits to it over XP unless you are going with the 64bit version, aside from the fact that it is newer and will therefore be supported for longer but that is a pretty minor argument in it's favour.