If you have a place for it, and it is your first buck, (a VERY nice first buck to boot) I think you will be happy to have the shoulder mount.
A good mount should last and look good for many years. The trouble that many have had in the past with the hides cracking after a few years was due to extreme temperature and humidity changes. Now, with heating and air systems being better able to bring stability to the indoor environment, mounts do better now. Also, taxidermists today have good epoxy type glues that help hold the hide in place which keeps them from shrinking or expanding around the eyes and nose. Even if a mount does happen to get a small crack around the eye or nose years down the road, it is a simple fix. Hair should never slip from a mount. If it does, either something is causing friction to the area, or a small demestid beetle has infected it, eating the hair folicles which cause the hair to fall out. Nothing lasts forever, that is a fact, but a good mount by a good taxidermist should give you many, many years of pleasure.