I remember reading somewhere once, probably on here, someone telling stories about the origins of 'math rock'. And someone had said this one guy had coined the term from watching really technical bands play and he would pull out a calculator as a joke and start punching numbers in order to calculate how good the band was.
Anyway, two bands I really enjoy that I didn't see mentioned are Piglet, which just released that one EP in the 00's somewhere. It's pretty alright.
The other is that japanese math pop whatever band Tricot. That's one of my recent favorites, they're so fucking tight.