I found out that the Motif-Rack XS has a GM bank of sounds that are "full" Motif XS sounds. Even though the Motif-Rack XS isn't fully GM compatible, with its separate bank of GM sounds there should be no problem playing SMF's through the Motif-Rack XS. Although, if you manually select sounds from the Preset Banks you will need to choose voices that aren't Mega or SAV voices or you may run into problems when playing SMF's. It might actually be possible to use SAV sounds without any problems. We will have to wait and see.
Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.