To me you have to spend a lot more on a sprung table to get the same sound quality
A bit more, maybe, but not much more. My Sota Nova VI w/vacuum costs $5700 without arm. Arms comparable to most JMWs can be had for <$1500, IMHO. They can provide armboards for almost anything you need.
Vs. my TNT6-HR (basically an HRX with 1 layer plinth instead of aluminum sandwich), the Sprung Sota is quieter, more dynamic. But take it with a grain of salt, because arm & cart differences come into play too. Tough to find comparisons limited to one variable! Cheers,
Spencer