Upload & Sell: On
I never subscribe to the 'oh I'm going ff eventually so I'll get a ff lens now' point of view.
Get what works for you now . You won't loose much in future come upgrade time.
Yup, What Ian said............Life is too short to play "what-if" and "in the futures" games. If you're gonna go full frame, go now, otherwise, get a lens that works best for the crop sensor, i.e. the 17-55 F2.8. Now THAT'S a killer lens!