Well I ordered the M55 in diamond black enamel today. Got an awesome price and I'm real happy after speaking to the owner of the store for quite awhile today. Real nice guy. Stove should be in by the end of the week, pick it up next Tuesday. Saw it running today and was impressed with the quietness of it on high. The M55 on high was more quiet than my current stove is on low. I am upgrading to 4inch exhaust pipe as well. The dealer did say something about setting the air mixture with a gauge when they install it. Now I will be installing it myself, so where do I get one of these meters?