That little vector 45 ACP would be very cool.
Consider and Encore/contender as well. THEN you can shoot whatever caliber you want and not have to be married to anything in particular.
A little rossie 92 would be sweet too. Not sure how short you would want to go though as SBR lengths there dramatically affect tube magazine capacity. Somewhere I saw a setup that slightly angled the tube mag to accommodate a suppressor, but I'm sure that was pricey lol.
Personally I like the ruger 77/357 for a SBR, say at about 10 inches or so. Subsonic stuff would be a hoot. The 44 would be sweet too, but I think it is tougher to find a suppressor that will handle that on a SBR without being too huge.