*UPDATE* Hedgie's suggestion fixed it. Guess I hadn't dug into MMs playlist creations deep enough. Thanks Hedgie, karma for you!
I use the Automatic playlists in MM to do it. It works pretty well.
I use iTunes everyday and it doesn't bog my system done at all. It works just as it should. I'm on Windows.
Thanks Hedgie, I'll give that a try.
dude, MM is crazy the amount of stuff you can do with it. AND it's hella fast. MM is seriously amazing