I have the MG1.7's as well. I think adding the quality sub is a great idea - super speakers 
James
In fact, I tried the speakers at home with a Plinius Hautonga an the result was great, but decide to give Bryston a try, although a bit more expensive and without hearing or even looking at the units. I was told by the portuguese dealer that it´s impossible to try Bryston´s new amps. More than this, the units must be paid on order (or at least 50%) with no refund in case of dislike.
So, this is a vote of trust.