I need a 36" range hood for a 30" range. Budget ran out, so I'm looking for the least expensive chimney hood that's still worth buying (something under $700). The brands I've found are Windster, Cavaliere, Kenmore, and Broan. The Windster and Cavaliere offer CFMs of 6-700, while other brands in this price range offer 2-400 CFMs. Does anyone have experience with either Windster or Cavaliere, or have any wisdom to share?