I've been running Spatial M5s with a 2-Cherry King version for the last few months. The system sounds quite nice. My room isn't particularly small. About 13.5 ft wide in general and 35 ft long. Sitting and stereo area has a high ceiling (18ft) with loft surrounding it, and 8 ft ceiling behind the couch into a dining room that goes 12.5 ft farther. It's open beyond left speaker into hallway, and right speaker has a wall a couple feet away. Speakers are out from the front wall about 4 ft with some variability as there's a fireplace centered between them and small alcoves on each side. (Hell, I'll just add a pic) Seating is 10.5 ft from speakers set about 8ft apart.. So pretty good size space to fill with sound.
The M5s do an admirable job filling the room. The bottom end is good on their own, but I do have a Linn sub reinforcing the very bottom, crossed over at under 45hz. I like it better with.
From what I can tell the 2CHerry is doing a great job, very pleased and no complaints at all. Plenty of power. Presently an all digital front end consisting of Bel Canto CDt and Mytek Brooklynn Bridge (external PSU) feeding the Cherry and sub amp and the Spatials (all plugged into a AQ Niagara 1200). Connected with Zu Event interconnect and AntiCables 2.1 12ga speaker wire. It is a clear clean pretty darn refined sounding system for the money spent.