I have a Boomer 3040, so basically the same tractor as you. When I talked to a dealer that preferred to sell the New Holland blowers he recommended the 84" unit that NH's literature recommends with my tractor. I expressed concern that this was too much blower and he said that he hasn't had any complaints with it combined with my tractor. However, every other dealer I talked to that was selling primarily Pronovost (Puma), Rad Technologies (Blizzard), Allied/ Buhler or Erskine snowblowers recommended the 74" model that their company produced as the best snowblower for my tractor. Most of those companies produce a 72" and a 74" blower and the 74" is appreciably heavier, beefier and more capable than the 72" even though it's only a 2" difference in cutting width. They all felt that my tractor would easily handle the more heavy duty 74" models but that the 84" might be just a bit too much. I ended up buying a backhoe with my fun money instead of a blower, but when I do buy a snowblower I'll likely buy a 74" model.