I would suspect that you would prefer a warmer sounding amp. Even if your speakers are not that efficient, in a small room you should be able to utilize a tube amp of modest power output. I think something that runs EL84 tubes, or 6L6, or KT 66 tubes would sound good. These are nice sounding tubes that can deliver warmth without sounding murky or too polite and lifeless.
I personally find that the amp makes a huge difference in the sound, much more so than the choice of linestage or source components (assuming these are decent choices).