Hi Natty,
I am using the Spectron M3 (with Bybees)/Joule Electra LA-300ME combo with Vienna Accoustics The Music speakers and find the pairing to be magical (ICs are Jade Hybrids). I have never heard the Ushers so I can't comment on their sound or how they will interact with the Spectron but I can say unequivocally that the Spectorn/Joule combo works very well. If you do go with the Spectron amp I would also strongly recommend the new Spectron Remote Sensing speaker cables. Simon Thatcher played a major role in their development ane they work synergistically with the Spectron amp (much better than the earlier versions which I also have). As noted above there is a wait list for the LA-300 but it is definitely worth the wait.
I am using the Spectron M3 (with Bybees)/Joule Electra LA-300ME combo with Vienna Accoustics The Music speakers and find the pairing to be magical (ICs are Jade Hybrids). I have never heard the Ushers so I can't comment on their sound or how they will interact with the Spectron but I can say unequivocally that the Spectorn/Joule combo works very well. If you do go with the Spectron amp I would also strongly recommend the new Spectron Remote Sensing speaker cables. Simon Thatcher played a major role in their development ane they work synergistically with the Spectron amp (much better than the earlier versions which I also have). As noted above there is a wait list for the LA-300 but it is definitely worth the wait.