All modern .44 Magnum Super Blackhawks have the same frame, but not the grip frame. I highly recommend the 5 1/2" fluted cylinder model for a shooter. The 4 5/8" would be my second choice due to the unfluted cylinder and if I had a 7 1/2" I'd rebarrel it or cut it. I can't shoot the Dargoon grip models without discomfort but the regular round back trigger guard models are very nice.
If you are shopping for grips and the guy at the gun show is out of smooth and offers checkered for the same price, pass.
Full house magnums in synthetic ivory checkered grips are not very comfortable.