Maggie owners (past, present, future) what do (did) you love and or dislike about them?

Mewsicbuff, your room is perfect for 3.7i's. Maggies are an extremely easy load. They just require a lot of power. I like to see 200 watts/ch.
You should start with them 3 feet from the wall tweeters to the out side and toed in just a little. You measure your triangle from the tweeters.  If the bass seems a little tubby move them out to 4 feet. Dampen the wall right behind the speaker with acoustic foam tiles.
If you require more punch get subwoofers. 
You are going to love these speakers!

Mike

1+ richopp. I would like to add that the 3.7i might have the best cost to performance ratio in the industry.

No audiomaze you just killed the primary reflection off the front wall. I tell people to do this with acoustic foam tile. You did it with the curtains. All roads lead to Rome! 

mewsickbuff, take a deep breath! Your amp will do just fine. 3.7i' are not all that much larger than 1.7's they are just a more imposing image but in reality do not eat up that much floor space. The 1.7's are an apartment speaker. Your room is on the large side for them. 
Next. It is not that the imaging of 3.7i's to too large, it is that regular speaker's image is too small. It is like sitting in row 6 vs row 20. Forget about a realistic image of a jazz club with point source speakers. They can just not get you close in and large enough to be realistic but 3.7i's can do it just fine. You do have an interesting set up. If there in nothing between those windows you might consider putting your TV or screen between the 3.7i's and consolidate your systems. A lot of us do that. We put a screen or large TV between our 2 channel speakers and use our Stereo for HT duty. The only thing you need in addition are good subwoofers. I personally have absolutely no need for rear or side channels and nobody who has ever watched a movie with us has related being disappointed because of such. Quite the contrary. I do use a 113" diagonal screen and projector. 

simonmoon, it also helps if you add mass to the top of the speaker. I made lead caps for my Maggies back in the 80's by melting fishing weights into a form. My 2+2's have a 1/4 inch thick steel plate embedded in the top. They came with a 1/8" thick plate from the factory. This is even more important for the Acoustats as there are no magnets in it's construction. For the Soundlabs you can get the Ultimate frame which is made of sand filled steel tubes. I am not sure if they add any weight to their wood frame speakers.