What I want to do to get more mid bass and upper bass is getting 2 small 8" subs use the speaker inputs on the subs for each M2 left and right front and crossing them at 40 or 50 hrz. I guess what i'm asking is to use a combo of a sub and the m2 to get full range sound or close too it but I also want to use the SVS for the deep bass in movies and still use the small subs in a 5.1 system will it work with out cutting much bass from the SVS thanks

Have you looked at the Hsu MBM ?

Yep, sounds like a job for the Mid Bass Module.

The ep125 would do just as nicely for a better price

Well I was thinking about getting 2 ep125's and running speaker wire from the Left speaker binding posts on the receiver to the ep125 and then run speaker wire from the back of the ep125 to the m2s. and do the same for the right side. using each sub for the frequecys that the m2s roll off and the ep125s take over so i want a sub dedicated to each left and right channels plus use the svs for the lfe channel. I dont want to use the rca sub cable for the 2 ep125s just the sub out for the Svs. hope you kinda understand what i'm saying thanks

While two subs are definitely better than one, the idea of a separate left and right channel sub isn't really necessary because bass under the crossover frequency that will get played on the sub is non-directional. That is to say, you can't tell where in the room it's coming from anyways. This is why on multi-channel recordings, the LFE (Low Frequency) channel is always one single channel. There is no need to have it broken down further.