TL;DR: Have you played this cab with a drummer, especially a heavy-handed drummer in a rock setting?
Long version:
Color me curious on this li'l guy. I've been following this release and am trying to figure out if I'm crazy for wanting a pair. I already have an ELF 110 cab (16lbs, 300 watts, similar frequency range, $350 new) and I really dig it. Ridiculously powerful for such a dainty li'l thing, with plenty of low-end guts to o a 5'er proud.
I have 500 and 800 watt amps, and most of my playing is with a classic rock band that has a heavy handed drummer. I would never take the ELF 110 as my only cab to a rock gig. I view it as a practice/small jam sesh/small church w/no drummer type of solution. For full-volume gigs I usually bring a pair of 300w GK Neoii 112 cabs and a TH500. If I had a SECOND ELF 110, I would consider that for gigging.
Have you had any experience with the ELF 110 to compare to this SL110? I love Aguilar as much as the next guy, but I'm having a hard time wrapping my head around 200% more $ for 50% of the power. I still want to further reduce my stack's footprint and lighten the schlep, and have actually been contemplating a pair of the ELF 2x8 cabs, but then this li'l beauty drops and now I'm question the meaning of my life. The ELF 2x8s are 400w cabs for $580 each, vs 175 watts and $700 ea for the SL110s. I know wattage isn't everything... but like... do you think a pair of the SL110s would legitimately be able to hit as hard as would be necessary for a rock band carrying all the bass in a small-medium club?
I wish these drivers were rated a little higher to give me some comfort/fudge factor.

The SL210 (I know it uses different drivers) is rated for 400w (ie: 200 per driver.) I guess they're expecting ONLY TH350 owners to use these little guys? In these days of modern speaker design, is it not possible for Aguilar to have sourced or co-designed/spec'd a more robust option? Especially since Peavey/Trace Elliot and Eminence figured out how to offer double the power for half the price. Granted, those are built overseas with a cheaper cabinet design, yes, I get it.... but still.
I'm still waiting for Mesa to do this. I have the Subway 210 (600w cab that absolutely slays) and would LOVE this as a narrower, taller, 300w x2 modular stack. Really, two Trace Elliot 110s get close.
We truly are spoiled for choice as bass players!