I would lose the sub and have a pair of 7200s and a 7200HC.

I have owned both and IMHO the 7200HC is a big step up from the 5500HC and I doubt lack of base would be an issue in a room of this size.

Regards,
Carl


861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)