The griping about weight of tube amps is severely overblown, thanks largely to the efforts of paid shills for the ultralight amp companies. There are folks who have legit reasons to not want to be hauling around 90 lb heads and 150lb cabs, but seriously, I've never seen a single complaint about the weight of a Marshall 4x12 or two.
I'd keep the blue grille cloth for the AV cab. Black shows up much more road wear and dirt and the blue just plain looks classier. The SVT CL is an odd beastie among tube bass amps, sounding almost nothing like its ancestral namesake, but a nice tone in its own right. They have much less useful midrange and are more "traditionally toned" except in the lowest of the low end. It ought to get along with that Rick's snarl just fine.
Just pray that the protection relays in yours keep a good temperament. Once they go wonky, the only cure is to find some mega-output tubes that idle at currents too low to trip them. The old Ei KT90 used to be perfect for that, but they're extinct now and have been for over a decade.