Using the M60Ti's as mains and the VP150 with the EP175 won't be a mismatch; indeed, the amount of bass you get may not only be "decent", but possibly indecent! (Don't worry--you can always adjust the subwoofer level control.) Seriously, I believe for the size of room you mention, the combo you've proposed will provide very solid and satisfying bass for music and home theater.

Regards,

Alan Lofft
Axiom Resident Expert

Alan Lofft,
Axiom Resident Expert (Retired)