Photon's advice is bang on from my experience. I have 1.6's in a room that is essentially identical in size to yours. I needed to deaden the corners behind the speakers and pull them out about 5-6 ft to make them work. I had to work to at getting them to sound right after several years in a bigger room with vaulted ceilings and irregular dimensions. My speakers are 8.5 years old, and there is not the first sign of delamination, but on older speakers, delamination is apparently highly dependent on care (optimal humidity, low UV exposure), so it becomes a real risk on older speakers. Shipping is a real hastle. I bought mine new from a dealer, and Magnepan delayed shipping for almost a month to avoid shipping over the holidays. Picking them up is the way to go for sure on used Maggies. I buy at least half my equipment used, but when I get around to replacing my 1.6's with 3.6's, I'll go to a dealer, borrow a demo pair, make sure they work in my room, trade in my 1.6's and just pay the dealer for his services. That just seems to be a better way to go with Maggies. If you go for the 3.6's and make them work (or not) let us know.
