Ghosts and Vodka was a math rock band that only had three releases, but all of them are essential listening for the genre; mostly the album Addicts and Drunks. This record goes from soothing guitar rhythms, dynamic time signatures, and crazy finger tapping. Of course all the instrumentation on this is great, but I feel the guitars to be what I love most in here. There's tons of nice grooves and lay back sounds, but then it falls back into the tradition of spastic madness on other songs. Check this out if you don't know much about math rock. It's a good introduction album.