I own the SRA Ohio Class XL+ platforms and have heard the VR bases. As noted above, SRA is addressing their product's biggest shortcoming, which is their lack of universiality. Then again, their dedicated-unit approach is also their biggest strength, and what separates them from even the best of the competition. I've also owned a number of Symposium products over the years, and while they're pretty good, IMO they're not in the same league as the SRA stuff. While not cheap, now that the company is going to offer customers a convenient way to upgrade, it's a no-brainer to try SRA gear if you're shopping in that price range. It's FAR AND AWAY the best isolation equipment I've ever tried. Nothing against Symposium, but in my experience, SRA is the best of the best. It's taken my system to a level I would've never thought possible without it.