I had the same dilemma you're facing.
I got a pair of Clopay metal doors at one of
the big box stores.
They're MUCH lighter, don't rot, and look as
good today as when I put them up almost 20
years ago.
No painting either.
I'm sure there are other similar brands too, but
that's what I ended up with. If
you have an air wrench, they go together
in a couple of hours.