Knell: It's Bride's 'Live To Die', great Christian metal, check out 'Metal Might(!);
http://www.youtube.com/watch?v=ttB_YqzW ... re=related
(though this is some CD version with inferior mixing, drums sound like shit, just as is the case with Emerald's 'Armed for Battle' in the LP/CD comparison)
Sentinel: It's a 12" by a Finnish band. The A-side is quite ok, very melodic metal, but the B-side is a total waste of time ballad piece of crap unfortunately. I uploaded this to the MP3 section at some point. The vocalist lives here in Turku and I've been in contact with him, he was in a few other bands after this.