The fit and finish on the Sonus product is really nice. However as is the case with many Italian "designer" goods (Ferrari, Gucci, et al) the prices are jacked up way past the actual value. $750K for subs? Are there that many people rich enough or foolish enough to plop down $750,000 for these?
For me I'd rather take that money and build a fabulous listening room and budget $400-500K for some bespoke gear. But that's just one man's opinion. I also like French vanilla ice cream and you may like Dutch chocolate.
Cheers to anybody wo has earned enough clean cash to afford this stuff!