You're room size is slightly bigger than mine and the YBA should have no problem driving the 938s to ear bleeding levels. I love the YBAs, one of the finest SS amps IMO, but too expensive for me. Actually, your room may be slightly overdamped, but it may be easier to start off with an overdamped room and start subtracting until you get the desired sound. Just remember to give the 939s at least 2 feet from the side walls and 3 feet from the rear. You should not have honk as I have never experienced this with the 938s. As for bloat, it's very much function of your room. There's lots of affordable ways to really fine tune the 938s. Some of the tweaks can be surprising and makes you wonder why didn't Hyperion didn't think of it. But first get the general setup correctly. I should start a Hyperion owners group on audiocircle.com.