Using my Sonic Frontiers SFS-40 with Paradigm Studio Monitors (the big guys!) in my 17' by 12' by 7.5' living room I can honestly say that for rock music it just didn't cut it. My Bryston B-60 was a much better match when the volume needed to be upped a little. But your speakers are probably an easier load and if your room is on the small side, a medium powered tube amp like mine could be enough for you. The biggest area that suffered with the tube amp (if you can call it suffering - it still sounded good), was bass slam and ultimate control. The mids and highs here gorgeous!. My advice would be to get a good sounding solid state amp that has the power you need, and only buy tubes if you can afford big beefy tube amps where power is not a concern. A used pair of Sonic Frontiers SFS-80s (monoblocs) might be the ticket. Hope this helps.
Allen
Allen