I have a 21' AG Aqua Leader (Don't remember the model) and I love it. It's completely resin made so it won't corrode with ground contact. The ledge is sturdy enough to walk around the outside to clean the pool (we have a pool fence). It came with a beaded liner. Heard good and bad.

We moved last year and I took it down by myself and my wife and I put it at our new house by ourselves (since pool installs cost $1150+ in central Illinois) And yes, we're still married. We put an overlap (coral reef) liner in this time.

I would look at where/how you want your pool and go from there. I've seen people bury their AG pools part way. Are you putting a deck on? Try to envision the final setup and go for what fits into that. You don't want to have to setup based on limitations of the pool.