Just my opinion, but you should look for a wiimote, a classic controller pro, and a recharger with 4 AA rechargeable batteries so that you can keep one set of batteries charging and the other set in your wiimote (I leave all 4 batteries in the charger when I'm not playing). It's the best control scheme available for Tri Ultimate.Anyway is the Wii U Pro controller a good option?
[edit]If you don't like the gamepad, I'm not sure why the Wii u pro controller would be much better given that the buttons and stick placement are so similar.