Nixon is the man occupying the WK position in England's ODI side, and he has really impressed me with not only his WK, but also his leadership and batting. He is a big personality and is proving he isn't a mug with the bat. Personally despite his age, I'd like to see him given a run in the TEST side.
The other guys I would suggest are Read again, but more than him James Foster of Essex. He is still young enough, and is proving at Essex with his much improved batting that he has the potential to be a WK who scores runs at International level.