I doubt anyone looking for a $3000-5000 2.1 or 2.2 setup will cross-shop a $10000 (list)
$6500 (street price) 2.0 set

.
Besides dual subs for $2000 will play deeper in room, possibly louder and give better placement options too.
I'm not in any way trying to say the RBH are not good, heck the driver compliment alone is top notch and I'm sure the cabinet construction, crossover design and components are suitably matched.
The MSRP of the RBH SX-8300 is the same as the Revel F208 -- $5K/PR.
Basically each SX-8300's trio of 8" aluminum subwoofers is about equivalent to a single RBH SX-1010 subwoofer. And since you can actively bi-amp the SX-8300, the bass will be extremely similar.
Of course, separate subs and bigger subs will unequivocally produce more SPL and deeper bass. But in real life situations with movies and music, a pair of SX-8300 actively bi-amped via
LFE/Dynamic EQ/Ext Amp will shake and rattle the 4 walls of a 18' x 20' x 12' room like a rag doll and still produce tight musical punchy dynamic bass like the bass from a high-end tower speaker.
Not everyone wants a subwoofer. Hard to believe, but true.

A lot of people just want the 2 towers.

But most towers will not be able to produce the kind of bass like the SX-8300 because the SX-8300 can be actively bi-amped.
The Salon2 can go down to 23Hz. But the Salon2 cannot be actively bi-amped. Thus, the SX-8300 actively bi-amped via
LFE/DEQ/amp will produce significantly punchier and musical bass IMO.