The Kuzma Stabi R with Kuzma 4POINT9 or other Kuzma 4POINT tonearm is a possibility. I suppose the Stabi M and the Stabi XL would be more equal competitors for the SME 20/3 with the Series V tonearm, given the price categories.
SME has the reputation and longevity. The Kuzma tonearm has rave reviews. I'm not sure how the Kuzma turntables compare to the SME. . .
Insofar as the wall shelves, I'm not currently convinced of their efficacy in my environment, where my equipment is currently sitting on a rack on a concrete slab foundation. I would think the walls would vibrate more than the concrete floor here in Florida, as the walls are attached to the roof, and the roof is designed to allow wind to circulate under it. Not only that, but don't the sound waves from the speakers bounce off the walls moreso than the floor?
Merry Christmas, and Happy Holidays to all!