Frontier blades are made by other companies, and which company changes from time to time. I have a Frontier RB2184 that is very well made. I'm not sure who made it but it seems comparable in quality to Woods. If you can inspect before buying Frontier may be good - or not; my local dealer had two 2184's in stock and gave me the much nicer one, as the other one was clearly made to lower quality, and was not even the exact same design even though it had the same model #.
For quality Woods or Landpride are top bets. For price, King Kutter. If you can find Midwest Equipment, it looks good.