Nokia e55 (symbian) or Wildfire (Android)?

I'm in the market for a new phone around the £200. Pound mark.
Biggest factors for me are.....

Future proof-ness/ a good app store
Battery life (ideally 3ish days good usage)

Nokia Pros
Battery
Size

Cons
Symbian (ovi store sucks)
Screen

Wildfire Pros
Screen
Android

Cons
Batterylife (a day or so)

What would you do?

I don't want to spend more than £250