the pgp and 5000 are essential the same, though the 5000 has the ability to control flow and actually turn off the rotor. The pgp doesn't ( though the hunter i20 does)
It's true wind will push the water. It's recommended to water early morning where in most places in the world- the wind is the least in the morning. However, if designed properly wind shouldn't be a huge deal . Or design it to compensate for a constant wind application.
2gpm a nozzle is fine. I generally don't go lower then 2
Have you considered
MPR Rotator nozzles?