that room is close to the size of one of my rooms (it's 13 x 21 x 8), and I have used various full range speakers in it, never had a problem with boominess. I'm currently running Von Schweikert VR4 genIIIs which go to 16Hz, and they perform wonderfully.
I've used smaller speakers and a sub in that room too (Totem Sttaf with a Rel Storm III), and you're correct that placement may be easier, but integration may suffer IMO. I haven't had difficulty optimizing placement of my VR4III's
I've used smaller speakers and a sub in that room too (Totem Sttaf with a Rel Storm III), and you're correct that placement may be easier, but integration may suffer IMO. I haven't had difficulty optimizing placement of my VR4III's