First of all, congratulations on your retirement, mine is a few short months away.
I haven't shot the PSR, but I have a PL and it has the same riser. It seemed finicky at first and I was having some issues being consistent with it, but after making a few minor changes in nock point and shelf material, those issues seem to have gone away, thanks to Mike Bolin who was the original owner of the bow. If the PSR shoots like the PL, you should be very happy.
The Elkheart is a winner. One of my favorite bows ever. I started with a 56" and sold it recently to fund the new 52" Elkheart Magnum which should be ready in the next week or so. The Elkheart is fast and very quiet, and the grip is amazingly good. I don't see any downsides to the bow. Just make sure to talk with Gregg about the right length for your DL.
Let us know what you decide on.