I have mixed feelings about some aspects of the MTM configuration, but they often do a very good job in the nearfield and in Payip's application would most likely work better than a more conventional two-way. If the room is very small, then an MTM might have some tonal balance aberrations related to its power resonse in the crossover region (though probably not much moreso than a conventional two-way).
Personally I think a coaxial or full-range driver would make the most sense in this case (disclaimer - I sell some of each). Imaging and tonal balance can be very nice with a good coaxial or fullrange even in a very small room. The fullrangers I sell (Omega) also benefit from boundary reinforcement, so might be worth considering. Their high efficiency and friendly impedance curve means you could even use 'em with SET's.
The true nearfield studio monitors I've listened to have too forward a presentation for me to enjoy long-term, but maybe I just like a little euphony.
Personally I think a coaxial or full-range driver would make the most sense in this case (disclaimer - I sell some of each). Imaging and tonal balance can be very nice with a good coaxial or fullrange even in a very small room. The fullrangers I sell (Omega) also benefit from boundary reinforcement, so might be worth considering. Their high efficiency and friendly impedance curve means you could even use 'em with SET's.
The true nearfield studio monitors I've listened to have too forward a presentation for me to enjoy long-term, but maybe I just like a little euphony.