Ive owned two M3s, and got the chance to paddle the Burn in Ecuador for a day. I agree with cutch, the Burn kicked ass on runs with water, where your interacting with holes, and not rocks. Its way faster than the M3, and really zoomed through those holes. I had a tendency to over turn it, because when you floor it, the boat really responds, just something to get used too. I was very intrigued, because I liked it, but am a little hesitant to pick one up because it doesnt seem very forgiving on shallow runs, and big drops. I guess it depends on what style of creeking you prefer, Id be stoked to own it if I had a quiver of creek boats, but Im broke, so I aim for a good all around creek boat(M3), you know good on low volume, medium volume, big water, boulder gardens, slidey stuff, bump and grind, etc! I used to own an H3 as well, and felt the M3 was a step up towards steep, shallow creeking. The burn may not be considered a true creeker, but Im sure youd love it on runs like Fish Creek, Gore, etc!
Oh bye the way has anyone tried the new Everest?