Agree with all the above, including experimenting with tweeter in/tweeter out, air to the sides and back, and the need for toe in. Adding power will be the single best upgrade you can do. Also,consider stands that will couple the speaker to the floor for much improved bass. Other worthwhile tweaks include Cardas jumpers, and Hi-Fi Tuning fuses. Have fun!
Magnepan Placement
I have just picked up a pair of used SMG's and have to say, even thought they may not be the most recent version or the top o the heap, these things are amazing! Which leads me to my question, are there any "do's and don't" regarding placement? I have read Jim Smith's "Get Better Sound" and have applied his rules of thumb regarding placement from the rear wall, etc; however, I wanted to see if there are any secrets out there? Thanks in advance!!