Sorry for the jumbly (jumblier than usual) writing style. Tiredly mashed brains at work there focusing on essence. Anyhow....
That sure sounds like a good wiring plan if you are up for it. I am one who digs those complex and versatile wirings. I have a Lucille that I want to wire with a split and series parallel switches (one for the humbuckers and one for how the middle position behaves), plus put in a Zvex Superhardon Clone in the body too. And the varitone will still be there as well....muhahaha.
As far as the pickup choices, the SM should do well, but know that the MQ can handle the Fuzz Factory too. Remember that the Supermassive kinda was modeled after sounds Belamy got by running a MQ through a FF (among other things).
However, if you pick the option of being able to add a split bridge to the middle the SM gains a lot of versatility right there, especially on cleans I recon. With the right neck the range will be considerable for your area. It is a bit on where the focus in style is, again. The MQ can take a lot, but you have to have the right setup. It can keep up with a NB bridge and deliver a wide range. For the classic and heavy rock side of things it would deffo be the better choice, and plus with the NB it might give a little extra versatility on the medium range. The SM then gives you a great range on the heavier side of things and less requirement for added settings and effects when switching from the NB.
One thing though...consider using an Irish Tour instead of the MM (not going for...that other short ;)).
The IT should keep up with the other PUs better, though a drop will still be there. If you like your neck a little under the others, as I do, it should work, as its SC character should keep up the presence during the drop. The IT being somewhat of an MM plus works for you, as it has a little extra bottom end, mids, slightly rounded high end, and a certain extra rock magic under gain. Still bringing that woody spank and all, especially if you roll down the volume a touch.
So with your setup it should give you more, if you are willing to add a touch on the volume pot to the wiring. Funk is still there, but rock and blues will flow better.