I swapped HT speakers and room arrangements around, so I now have M3v4s on custom 36" FMS stands for the bedroom. You're right, the regular bookshelf version doesn't need a sub. The 36" stands are also the perfect height for my home office PC setup, which is now in the bedroom (very big bedroom).
Life is good. smile

Marantz SR7010
DIY HTPC
M60 x2
RP-450C
QS8 x2
QS10 x2
M2 x4
EP600
Samsung QN90A 85"