I think blkrbt should do whatever style he feels like. He's done a good job on pretty much everything he released and like I said it mostly depends on a maps look and feel what track should be used. Personally I think Traveler is probably his best one.
Whoa! he did another song, listening to it now. Sounds amazing, kind of like something that's inspired by both early CD games and 16 bit (think Sega Genesis) games. The only thing I can think of that could be improved on the third track is for the end to be trimmed off a little bit so that it loops better.