SkyLux on 11 April 2014
Based off of your OP I'd say:
Wii U > PS3 > XB 360
You said you miss playing Nintendo games and you never had the Wii. You would get to play many great Wii games for cheap now and get access to the upcoming Wii U games.
The PS3 would also be a fine choice considering you stated there are some PS exclusives you'd like to play. Though, investing in a system that will only get less support from here on out might not be worth it. (Since the PS3 is still a good amount of money)
The XB 360 would be a pretty bad choice honestly considering you already had one and sold it for the XBO. It's your money though.
