The Samsung HL67A510C is a 67" DLP with 1080p and 3 HDMI inputs. I do not believe it is an LED engine.
Here it is on Samsung's site (HL67A510 model):
My viewing room is a daylight basement (about 4' under ground). The room is 13' x 18' in size and has 2 windows in the back-right corner with wood blinds. The room is not very bright even during the day.
The TV is on one end of the room in the center and sits on the factory stand (about 2' off the ground), we sit on the other end of the room so we are about 13'-15' from the TV.
I am looking for settings recommendations.