I've got some older Magnepan MG-I's with a 200 behiend each.... sounds wonderful and as far as heat, they stay cool but there's plenty of space above and aprox 4 inches below (they're standing on some little metal stands to keep them off the mg-1's bases and not become "one" with the speaker

Have you decided to get them yet? or since it's been a while do you already have them?