I have to agree with Stephen in that it all boils down to whether you want real buttons or a touchscreen. Both will handle your equipment fine - except I must ask, does your DSS receiver accept IR signals? That's the only requirement, but I ask because some can't.

One thing I can say in favor of the AV2000 is the the most technically "uncertain" person I know picked it up right away. They look at the SL9000 and go cross eyed... all those little buttons! :-)