I believe that 100 watts of Joule OTL power would be too much heat and more power than required in a small room although you don't give specific dimensions. I had a Joule VZN-80 in my 16X18 12X9 L-shaped room and it was more than enough power but oh my, the heat!! Carefully consider this before committing to the 100 watt Marquis in a small space, it may be more than you bargained for unless you like listening to music in a sauna, only half kidding but you get the picture, 800 watts at idle can heat up a small space fast.
Sonic wise I heard that specific combo under show conditions set-up by the Master but not in my own listening space. I did listen to several pre-amps through the Merlin Joule combo, a no brainer it is so good. As Danamc notes, the Berning is also a superb alternative although the amps are sonically different enough that one will be preferred over the other. The noise level of the Berning is lower than the Joule. I found the Joule to have an unobtrusive hum from the power transformer which didn't at all interfer with the music.
Sonic wise I heard that specific combo under show conditions set-up by the Master but not in my own listening space. I did listen to several pre-amps through the Merlin Joule combo, a no brainer it is so good. As Danamc notes, the Berning is also a superb alternative although the amps are sonically different enough that one will be preferred over the other. The noise level of the Berning is lower than the Joule. I found the Joule to have an unobtrusive hum from the power transformer which didn't at all interfer with the music.