Go have fun!
It will be the only time in your flying training you will be able to do what you want!
Make the time useful so you become a better pilot for your CPL! i.e. whats the point of buying 100hrs in america to just fly around one place?
Buy 25 hours in america and do a trip...come home do a trip in the UK, do your IMC...fly to france...i.e. have fun and learn at the same time!