I use Harbeth SHL5s in a room approximately 7m x 4m, 'firing' from the short wall. I have no bass problems with this setup so I suggest you add SHL5s...
Although I've been a member of the CA forum for 4 years I've only recently started looking seriously at how to stream and serve music files and would...
(1) Mac Pro with iTunes (ALAC) ethernet to Airport Extreme to (2)[br] AND firewire to RME Fireface 400 > LFD integrated > PMC DB1 and Sennheiser HD800 (creation & monitoring)[br](2) Apple TV + iPhone remote AND PS Audio PWT > Bel Canto DAC 3 with VBS1 > Krell S-275 > Harbeth SHL5s (enjoyment)