This Uber212 tone sounds very promising! I run a Shuttle 6.0 through an Epi UL2-410 (love it) and have played it through the Berg AE410 as well. Both are excellent cabs and I've been a 410 guy for years but a 12 has a little more meat and less snap to it than a 10 from the same line, making for a real solid tone. I've thought that a NeoX112 on top of a NeoX212 driven by a Shuttle 12.0 Max would provide a tall lightweight stack with a nice balance of focus and low end. Something with a little more focus than the Epi UL-410, a little deeper than the Berg AE410, and minus the Neo honk would be perfect. The tall format is nice for hearing yourself up close. Dennis, did you notice any difference being able to hear yourself onstage with the Uber212 versus the Neox212 or a stack of 2 NeoX112's?
This beefed up construction makes sense for the tone differences described. So far I see 600 watts @ 4 ohms, 42-18k Hz at 102db, 63 pounds for the Uber 212. What are the dimensions on this cab (?" x 24 1/2" x 18")?
Shuttle/NeoX followed by the Max12.0/Uber212...

Genz Benz is really getting out some fine products, gotta check these out.