I think that many people get great sound from MLs placed 3 or 4 feet out from the front wall. Martin Logan recommends 2 to 3 feet. I don’t think having your rack behind one speaker would be that big a problem. You can experiment with diffusion on the other side, a cd rack or a diffusion panel or something else. You don’t need technically ideal conditions for the MLs to sound really good.
You can find the owner’s manual on their web site and see what they have to say about it, and you can probably call ML and talk to someone about it.