The k750i is one of the best phones i've ever used, however one pitfall of it is the joystick, i've had two die (in one or two directions) on me twice now. I've been offered an N70, all i'm really bothered about is how good it is at calls and photos! Running third party apps would be cool too. Is it a worthy upgrade? (Note N80, N90, W800i etc aren't available to me atm).