Here is the history: we had a Phaethon that we liked a lot, but we sold it because didnt have bunk beds and we weren't using enough. The bug didn't leave us, so recently we bought a gasser with bunks...
I'd definitely select between the Tiffin and the Winnebago with the choices in that order. Nobody has a better track record of quality & support than Tiffin but Winnebago is not too far behind. If you happen to see something from Newmar, that is the name that I'd rate between Tiffin & Winnebago, if they have what you want. I would then choose based upon the price, assuming that all are equipped pretty much the same. Either Tiffin or Winnebago should serve you well.