To the extent that these threads are an excuse to talk about pieces of music, they are cool. It's neat to compare what you think of a piece to what others do.
So I can't help but think that a tournament is the wrong way to do this. It gets boring to listen to the same songs again and again in the later rounds - I know I started losing interest around round 3, as I'd had my fun by then. (To be clear, I did enjoy the tournament and appreciate the work that went into setting up the first two rounds - I just stopped after it wouldn't be enjoyable for me.) The artificialness of "yes the two good songs in the pool of eight got paired against each other" doesn't do it for me either - this isn't a pretend dueling match, so there's just no reason for that to happen. I guess there's something to be said for giving a second listen to pieces, but still.
So I'd recommend just picking some pieces and talking about them. That's it. Okay, sure, fine, add in ratings for each piece as well, like in the rate-the-character-in-game rankings threads elsewhere, if you want. But I imagine that would be interesting enough as is. Or, to keep it to a more tournament flavored feel... use the format of the List tournaments. 64 songs can be 4 pods of 16, with the top 4 of each pod advancing to a final 16. There's still a second listen phase for the best, but there isn't the stamina-destroying hell march that the later rounds would be. (Or for a huger tournament, 128-> 8 pods of 16, top 4 advance -> 2 pods of 16, top 4 advance -> top 8 finals). Either one of those two options would be my preference.
Also we're totally owed a failure round of pain from the original game music tournament, one of these days.