Delsfan, having heard Aeon's, SL3's, Prodigy's, and the Aerius, I would suggest sticking with the Magnepans. I've never heard an ML where the woofer integrates seamlessly with the electrostatic panels. I've only ever heard them in a dealer environment, with less than perfect setup, and I know from what other people say that they can sound really good, but I just don't think you'll have the same issues with the 1.6. What is the problem with your room?....remember that planers radiate in a figure 8 pattern so sidewall influences are less than with a typical box speaker. The only real issue I would see is if the wall behind the speaker is uneven, or opens into another room or whatever. You need that wall to be even and parallel with the speaker to reflect evenly back into the room. If you sit fairly 'nearfield' you can eliminate many room influences, with the exception of the wall behind the speaker.
I'd stick with the 1.6 over ML's.
I'd stick with the 1.6 over ML's.