It's not just the cpu is it? The mobos suggested are around the £100 mark. I'm fully aware that the AM3 socket is at the end of it's life but a phenom II X4 and a discrete mobo would shave £100 off minimum, which could get a better gfx card or SSD as you suggested.
For the record you have spec'd F all either. So don't troll at me for trying to be sensible with someone elses money. If the user needs an i5 he needs it, these are our opinions sayso may well be wrong and yes I could be too. Till we know what it's for who can say?