Hello, welcome to the forums.
Now what kind of surround sound troubles are you having? We have people who are more than capable of assisting.
Sorry for replying so late... but I had literally just found out that Wii U only supports a different type of surround sound..."generic" surround sound if you will. It does not support any type of Dolby like the Gamecube and Wii did.
So I searched the web for the surround sound that the Wii U offers and found one from Sony for $210. The surround type that Wii U supports is called LPCM...as I just heard about it this year.