Terymc,
I don't own any Accu-tac's. The one in the video was one I borrowed for about a month. But, I'd be happy to review the SR-5 if someone sent me one. One thing I forgot to mention is that the SR-5 does not have the wide top area like the FC-5 and Atlas. So, it probably has a smaller base footprint.
I saw a few notable names at EBR using the Accu-tac system with success. When I'm on bench I almost never have a need for panning (not even for speed silo).
I'm an Atlas fan (even though they cost so much). I think you would be happy with either one. Check out the rest of the Accu-tac lineup. There might be a model that's adequate for your shooting style that would save you $.
Tom