In reply to:

Some guy is selling a pair of new M60 (still in box) for around ~800$cdn

Should I still invest in QS? or buy these and use the M22 as rear



Luc, as many have suggested, the M60s are way too large for that size of room. You will have alot of problems getting them placed properly without a good distance back from the fronts.
The QSx surrounds are by far the best bet for that smaller space as well. Direct firing speakers for surrounds in that tight room will likely draw too much attention from their sound dispersion. I put up a post a long time ago with my thoughts on the QSx vs. M22s as surrounds in a smallish room.
Peter also suggested using the Axiom Full Metal Brackets for taking your front speakers out of the corners and into the centre of the room as well. I think this will make a huge difference in helping you place the sound together in a more seamless soundstage.
Sonic gave a great link to a centre channel stand that should also make a world of difference. The centre should be firing towards your ears and not at the ceiling. I'm not really sure what you hear for dialogue at the moment, but it can't be good.



"Those who preach the myths of audio are ignorant of truth."