The Yamaha HS8 edges out the JBL 308P MkII monitors in this comparsion:
Yamaha HS8 vs JBL 308P MKII The Yamaha HS8 demands an audition.
Yamaha HS8 8 inch Powered Studio Monitor 120W Powered Studio Monitor with 8" Cone Woofer, 1" Dome Tweeter, and Room Control and High-trim Response Controls (each)
$740 a pair
The biggest advantage of the iLoud MTM is its smaller size and weight. You can position them in tight spaces. It comes with a room calibration kit.
It has to be doing some fancy electronic wizardry to get them to emulate the bass response of typical 8" drivers from two 3.5" drivers.
One can easily understand the popular appeal of these monitors. They blend in as ideal desktop monitors whereas the HS8's will look bulky and awkward.
One should not forget that Yamaha makes an affordable 2.1 speaker system for the GENOS.
Yamaha GNS-MS01 Speaker System for Genos2.1 Active Monitor Speaker System for Yamaha Genos Arranger Workstation with 2 x 20W Satellite Speakers and 1 x 40W Subwoofer
$330
The satellites are even smaller than the iLoud MTMs. If the performance is adequate, why spend any more money?