I have a 1050 running a pair of Ascend Acoustics CBM-170's, a B&W center channel, RA Labs Micro-monitor surrounds and a PSB Subsonic III 12", 180w sub. My TV(for the meantime) is a JVC 20" job(not even flat-screen).

I think the EX option is strictly handled at the processor end.....either you engage it or you don't. With some titles, the "flag" for EX triggers 6.1 automatically no matter what.