Like automobiles, there is a huge variety of doors and windows with varying prices. If you're in Florida, I'd check out PGT.

I personally think the Sunrise slider is nicer than that the Provia in this comparison. The Hinged patio or French equivalent of the Provia door would be more expensive as a standard when compared to their slider variant. Most folks have the idea that the French is a more premium door than a slider but the slider works better for most people because it does not encroach into the roof vs. and Inswing French and it has a screen as a standard whereas an Oustswing will not.

Sorry wrong forum; don't know how to delete this!

If you already have a double pane door, the problem may not be the door. Before going into expense of adding another layer of drywall to the walls and ceiling and replacing the door, I would check other things. Like bathroom exhaust fan ducting...is it insulated? HVAC ducts. Plumbing vents. Gaskets on all the exterior wall switches & receptacles as well as ceiling lights. Recessed light cans? Pull a piece of door/ window trim and check that the space between the jamb and framing is insulated.