They're more like J-pop/rock in my opinion...
They do have the rock, but they're stuff's kind of upbeat and even 'OVER' has a little bit of pop/upbeat feel to it though it's pretty hard...o-o;
Did anyone catch the Gundam SEED special on 'OUR MUSIC' last December? It had TM Revolution (ignite, INVOKE, Zips), Nami Tamaki (Reason) and HIGH and MIGHTY COLOR (PRIDE)? I was wondering if all the songs were given a lighter arrangement, because I can't image HandMC with a piano arrangment or something. It'll repeat in 10 weeks on KSCI so I can't wait to see it!