I don't think that there a many ML owners here. You should consider checking with the ML forum. I found them helpful when I bought my ML sub.

I would check with www.audioadvisor for the Theos speakers. Also consider buying the Theos for the front channels and then using the Martin Logan Motion speakers for the rear. It will save you a lot of money and sound great. The Motion bookshelf speakers have the same airy sound as the Theos and company.

MartinLogan - Motion 15 - Bookshelf Speaker-Audio Advisor

MartinLogan - Motion 4 - Bookshelf Speaker-Audio Advisor

If you have a Best Buy Magnolia store near you, you can hear these speakers. I almost bought a pair of the Motion 4's for main speakers for my TV. They are crystal clear and very detailed.