I've boughten a few Wii remotes and have plenty of use for them - mostly for the Wii games I've bought. I think you may find a few Wii games worth buying and playing on the Wii U - Super Mario Galaxy is one such game.
The GamePad has been great. I have no issues with battery life or performance. Off TV Play is quite cool and useful. I'll be watching TV and playing a game at the same time. Or I'll wake up and grab my GamePad to play a game before getting out of bed. ZombiU and other games that really take advantage of it create new gaming experiences that are quite fun.
The Pro Controller is nice to have, but most of the time I prefer the GamePad.
The GamePad has been great. I have no issues with battery life or performance. Off TV Play is quite cool and useful. I'll be watching TV and playing a game at the same time. Or I'll wake up and grab my GamePad to play a game before getting out of bed. ZombiU and other games that really take advantage of it create new gaming experiences that are quite fun.
The Pro Controller is nice to have, but most of the time I prefer the GamePad.