I'm not a big fan of the Neo-Angle showers. I had one in my last home. When you drop the soap and bend over to pick it up, your butt winds up knocking open the door.
If you have wobbly walls, that just means you went cheap.
When ever I install a neo-angle, I bring in a glass guy that knows his stuff, and the doors are rock solid.
The kits at big box for a neo are a joke.
The Shower head and valve for a neo should not be installed "on center", but at 14-1/2" from the wall. That puts you closer to the long wall, so that you don't have to stand right next to the angled cut away.
If you have room for the neo angle, you may be able to get away with a 36x36" pan with a wall framed in, or by using a double threshold and using two walls of glass. Again, use a shower door installer, not the flimsy kits.
I like to go with a pan, and either tile or cultured marble for the walls. I don't like the kits, the walls are too short, and they don't cover the tear out. I would rather have a solid surface that covers the tearout, and not have to do any drywall repair, texturing and painting. Why add $1000 to the cost for drywall and paint when you can spend a few hundred and have a much nicer looking shower, one that is tall enough for the shower doors.
Have you ever seen a shower door that is taller then the enclosure? It kind of sucks and the home owners have a big case of buyers remorse when they see how bad it looks.