Test drive for sure.
Pick what you want or need for a site window first. That is really the biggest difference to me between the PCH, PSA, and PMA. That could well rule out a bow. I shoot with a small amount of cant so I need a PSA site window shooting split, but I can work with the PCH three under.
Another factor is if you want a lot of riser weight. You get the most with the PMA, but an iron wood PSA or PCH has plenty. Is a lot of weight to hold up good or bad for your arthritic hands? Heavier is more tiring on the hands, but it does cut the vibrations more.
Then pick the limb length that best works for your draw length. BW doesn’t even recommend the 62” PSA or PMA for 27” draw. More than likely you will not get best performance out of 62” bows at 27” draw length. I am sure it will be very smooth, but why go so long if you really can’t get into the performance of the limb or see the smoothness of a longer limb? A 60” PMA, 58- 60” PSA, or 58” PCH will have the recommended draw length range for a 27” draw with plenty of room to draw longer. It is best to ask BW about the best all around draw length for you on each bow.
I actually think they are conservative on maximum draw length. I have a 29” draw. I can shot a 58” PSA with no noticeable finger pinch and zero stack. My draw is max recommended for the 58”. I can also shoot a 56” PCH with tolerable finger pinch, but smooth all the way with no stack I could feel. That is 1” longer than recommended on a 56” PCH.