Crion,
good choice but not for M products. Moste of the Sage DCDI is not for use with the scaling feature from M.
Where did you see the 500? With comparison you made?
HT-300 Link: at the moment the wrong primaries or maybe more worse wrong Color wheel. Not the new 7 segment dark green Wheel witch is a base and the Sim didn�t offer
Same with xtra.
The Sims are very dim , compared to the Sharp Reflective power of screen with the HT-300 is~7ft Lambert and the Sharp has~11ft Lambert what is quite close to the specs for digital cinema (12ft Lambert)
The recommendation of the Sharp i rate much higher because it is HD-2+ and 7 segment colorwheel.
Best
Armin