Hi Kansan,
Are you going to shoot PRB or conicals?
If PRB, the slow twist .54 GPR is an excellent choice and very accurate out to 100 yards. It's also a heavy gun, significantly heavier than the Deerstalker due to its long barrel. Its extra weight will make the recoil from even the heaviest PRB load easily manageable. My .54 GPR shoots PRB with excellent accuracy out to 100 yards with very little recoil.
There is also a version of the GPR with a fast twist barrel suited to conicals. It's the Great Plains Hunter (GPH). It also has a long barrel and is rather heavy. Being heavy it should recoil less than the Deerstalker firing the same conical load. The GPH has a good reputation for accuracy among most posters here, but there have been recent exceptions. I don't own a GPH yet, so can't speak from personal experience.
The Deerstalker, with its shorter barrel, would be good if you have to hunt from a blind. If you shoot conicals, the recoil will be significant, but I believe the Deerstalker comes with a recoil pad. That should help a bit. The intermediate twist rate of the Deerstalker will permit it to shoot either PRB or conicals; but because it is not optimized for either, it may take a little longer to find a load it shoots well.
Keep in mind, conicals are heavier than PRB and will give much heavier recoil for the same powder charge. They also carry their energy better out to extended range. However, the PRB usually gives best accuracy at long ranges and a .54 PRB should have plenty of energy to kill deer at 100 yards IF THE SHOT IS WELL PLACED.
Bob