zootjeff; you got some good points here; let me add a few:
I bought a fiberglass Leer 3 years ago in Hillsboro (that distributor is out of business now). My canopy is a couple steps up from the basic one: I don't have the front sliding window because my truck doesn't, I do have the headliner & recommend it if you're going to sleep in the back. Mine also has sliding side vent windows; also important if you're camping in it.
I felt one important feature is the back window; I got the curved glass single-piece. My view is that it will last longer and is less likely to break than the framed-aluminum ones you see on cheaper canopies.
The canopies come stock painted a basic white; the matching paint is included in the price though some cheapskates opt not to get it painted & get a $200 credit or so.
My one regret is that I did not get the cleats for a roof rack mounted at the factory. I need a roof rack and have to go find a dealer to install them. It's not a big deal aftermarket, but if you get it done at the factory, the headliner covers the big rivets.
I've been very happy with the Leer; just make sure you keep the C-clamps tight & lube the proper points & you'll have no problems.
FYI, Glasstite is apparently the top-line manufacturer of canopies but they are really expensive. I was quoted about 4K for my Taco; a bit stiff for a basic truck. If I ever get a Tundra (if Toy ever makes a diesel), that's what I'll get for it.
Cheers,
C