To actually answer the topic...
Junichi Masuda has done a very good job with the music so far, and I certainly applaud his efforts. However, what would be awesome beyond belief would be if Koji Kondo had some influence over the tunes that we hear in the game. Face it: everything he touches shimmers with pimposity. He'll make the bike music good, for one, something Masuda seems to have trouble doing. More importantly, together Kondo and Masuda will raise the music in the games to such a level that they won't be repetitive nor ephemeral, not a single piece.
I'll all for this new ear candy. Have Koji Kondo do it for the win, with Masuda making sure it maintains a Pokemon feel.