The onboard fans are a non-issue. Believe me, in a residential setting, these things are merely coasting along .... which is exactly what one wants wrt dynamic capability and signal tracking.
You make a great point regarding resale value. I highly recommend you audition them first, but at any point down the road, you could easily sell these to the portable sound community.
The biggest shortcomings ... tough one really, maybe the waveguide/horn plastic could be thicker and ring less. That's splitting hairs. Another is potential diffraction associated with the cabinet edges. Both those potential
issues are easily addressed. The horn issue with some rope caulk/duct seal, .. and some duct tape (a common tweak w/horns), and some felt, foam etc, on the rough or abrupt edges of the front.
They need care taken in optimizing toe angle for optimal imaging and FR. Once that's achieved, these are giant killers,.. mjaudio, in the thread I'll link to compared them favorably to his Von Schweikerts hifi loudspeakers, that's quite impressive.
Myself, my K-8s destroyed my Klipsch 8" two ways, and compared to my Cats, the higher build quality Cats simply have a level of refinement and much more robust ability through the midbass, somewhat better coherenceoherance top to bottom help in part to the coaxial approach. But that's a pair of the finest 12's available, in an entirely inert, sealed enclosure, ... as opposed to an pro 8", in a plastic box optimized for portability.
I'm convinced the KW122s, with a nice effort of optimization with toe angles, Audyssey, etc, would easily make someone very happy for a long time. It's a simple, well vetted recipe, ie; a pro two-way, compression HF, in a conical waveguide, both sections matched coverage at the crossover, DSP contoured and high power/high sensitivity.Here
is a discussion you may or may not be familiar with.
Best of luck, audition as much as you can, and give strong consideration to a SEOS based platform, if you have any DIY inclinations.