Thanks for confirming. I am running 5.1 (for now), so this is not a problem.
Also, Gonk, thanks for all your insight elsewhere on this forum, too. The other night I checked out your links and read all your reviews. Very helpful. I think I am going to get an MX-500 based on your review. Seems it will work well with my 990 and my new Yamaha s-2500 universal DVD player. By chance, do you know what version of remote is an mx-500 with R.F.?