Anyone like August Burns Red?
Messengers was pretty great, although I completely ignore the lyrics. Check out Oh, Sleeper if you like them.
as for my top metalcore, it's too hard for me to narrow it down to 10 for now, but i'll try later
Between The Buried and Me - Colors, The Silent Circus, Self-titled
The Red Chord - Fused Together In Revolving Doors, Clients
Oh, Sleeper - When I Am God (good christian metalcore)
The Dillinger Escape Plan - Calculating Infinity, Ire Works, Irony Is A Dead Scene
Ion Dissonance - Solace
Psyopus - Ideas Of Reference
Protest The Hero - Kezia, Fortress
Reflux - The Illusion of Democracy
Architects - Ruin
Converge - Jane Doe
Car Bomb - Centralia
I also checked out Maroon earlier as I'd never really heard of them before...great stuff, I only managed to find Endorsed By Hate though.