Well certainly you'll have an easier time setting up two speakers than 6+ speakers in that room! Although maggies can be challenging to get sounding good in a room, due largely to the bi-pole nature of the speaker, and phase cancellation and comb-filtering, etc.
Maggies, ey? I am only a bit familir with the Maggie models, and mostly the 1.6's, 3.6's, etc. My exerience with Maggies is that the definitely make better, more practical, music speakers than HT speakers largely. They tend to be a bit delicate, and can be pushed to hard if not careful. Also, they are rather low sensitivity designs, with low impedance curves. This, for the record is the antithesis of what a good theater speaker is(mosly higher sensitivity, and efficient...thus very dyanamically effortless!) Also, movie soundtracks are several times more demanding than most of your likely music choices! Dynamic Dolby and DTS dig can play havock with systems, so be careful. DEFINITELY cross the speakers over at 80hz, and let the sub do the bottom end.
Also, I don't see a surround sound pre/pro in your list of gear. If you don't plan on using one, and just using analog pre-out's of your DVD player(processing Dolb Dig in the player), you're even further degrading the dynamics and overall soundquality from movies! YOU NEED TO GET SOME SORT OF OUTBOARD PROCESSOR FOR your DD/DTS material! It otherwise never sounds as good just playing through your 2 channel analog set-up.
You sollution would be to "loop" a digital pre/pro through an Auxilary or tape loop on your Audible Illusions preamp, and just click on that input when you want to play movies. That way you can keep your 2 channel issolated.
Another consideration with the maggies is that they are largely "sit-in-between-the-speaker" monitors!...just like all stereo bipole monitors(unless you're talking about diffuse rear/side speakers, and that's another story.). If you sit off axis, or have other people over, consider the off axis sacrifice and phase cancellation effect, which makes any seating possition outside the speakers focus sound somewhat filtered, muted, and bland compared to on-axis seating. I've found this problem with Martin Logans and Apagee's, and other planner type speakers as well for multi seat applications.
An upside to using maggies
Another alternative, one with probably better overall effect, pressence, and dynamics, would be use some less ambitious(albeit better suited for the job) wall mountable monitors for your HT dubties, and keep the Maggies on the floor for you music dubties!?! This way you can do what ALL the Stereo Mag reviewers/writers do, and keep two separate systems, even though it's all in the same room/location....it's a consideration anyway. You could even go 5.1+, and use a clean sounding receiver instead, keeping your 2 channel separate. Again,it's a consideration.
Remember, movie soundtracks have different demands and
attributes. Movies are not high purity audiophile recordings, that are untainted! Just go to any top flight local cinema and listen! What's demanded, is speakers that are dynamic, have good focus, dialog intelligeble, and have good pressence and detail! Yes, having uncolored, clear, neutral, refined sound is always a plus, but it's not what's ultimately needed to maximize movie soundtracks. They're largely overdubed, mixed, layered, re-edited, over-scored, and processed recordings! You'll always have "boxy" dialog, and sonic flaws, and indistiguishable sound effects and sonics. Making trying to pressent movies in an audiophile light is not really that practical to a large extent. So, when you say your using your more delicated and refined gear for HT purposes, I just want to try to put things in perspective, and that's that your more laid back, mello, delicate, low sensitivity, rather limiited dynamics, audio system is much better suited to your music applications, if your going for "WOW FACTOR" for movies that is! Not to bash your gear, contraire! I'm rather trying to be honest and make you aware of what to expect.
If you wanted, for example, you could easily, and cheaply, get some more than adequate higher sensitivity satalite speakers and a receiver, to mount in the room, and you'd probably be way ahead of the game for movie listening!
Guess you gotta weigh your priorities. I know you mentioned "mainly music", so you can feel assured that at last that medium has a good chance of very good success as is.
Anyway good luck on your project, and have fun...it's all good.