At first I am going to get a pair of m7ds to go with my m7c1 and m71 and a sub. I live in Canada and Mission's speakers are expensive here. But now my mum is coming to visit and she can buy the speaker for me! The m73 here is twice as expensive in UK! So if she can get it for me, I can use my M71 as rear suround. Is M7ds better choice? And is m73 too big for my room? My room is around 250 to 300 sq ft! I really needed help on this guys thank you for your help! The main point is I can save alot getting the m73 from UK! So M71 with M7C1 and M7DS better or M73 with M7C1 and M71 better?