Forgot to add, buy a jap one with firmware v 1.5 or less if you can get hold of one. Supposodly better screen and they can play "backup" games off the memory card too (the Uk ones run firmware v1.52 and 2.0 and wont play games from the memory card).
I had a Uk one and swapped it for a jap import (friend wanted to play a game that would only run on 2.0). I can always upgrade to 2.0 at a later date.
Having said apparently that you can now downgrade you're uk psp to run firmware 1.5. Worthwhile if it works.
Iain