Cheers for all the help guys.
Theres a big guitar shop not too far from me, and I know they stock alot of ashdowns, so i'll probably go and try out what they've got.
I think I would rather go for a new, I dunno, thats just me.
Talking to a guitarist friend, thats definatly powerful enough. he knows the place where I would play (local band night) and he recons 120watts is around powerful enough (as it can just be mic'ed up). But, I'd rather have too much power and turn it down as opposed to the other way round!