I'm a little worried about my Monster at the moment as well. This misfire at very low revs can't be right, so I've put a few questions out to the community to see what the general opinion is. My only experience of riding a twin is that of my 1098. That, as you well know, is an absolute dog below 4000rpm and under 30mph. The 1098 isn't designed to be ridden slowly, but the Monster is. It's supposed to be a City bike, so anything I can do to make the ride smoother will only be a good thing.
I decided to concentrate on hard guards instead of bar muffs for the Monster. There are some professional options, but I really like the look of some that are made by a member of the Monster UK forum. I'm all for supporting the little guy so as long as they fit, I'll pick up a set to help cut the wind chill across my hands.