As far as increase in sound quality - the answer is subjective.
For me I can - the Monitor 7 to me, has a dark sounding mid-
range that lacks resolution - the highs lack extension, and the
overall sound is somewhat grainy - with a boomy bass.
With your size room, you can even get by with some nice book
shelf speakers - since you have a good subwoofer.
To me, speakers from Focal, KEF and Monitor Audio do perform
overall better. Also, look into PSB. In the states, NHT is a good
one - and they ship to Canada.
Who and Where - is the Way, the Truth and the Life?
Speakers > Boston VS 260, Snell K7, Boston E60,
Pioneer BS22, Cambridge S30 (modified)
Receiver > Denon 791, Pioneer Elite VSX30