Replicas are the best if you are thinking about showing your grandchildren down the road.
They will last forever. I have some skin mounts, that are almost 20 years old of bass (Dad's from the east coast) and some salmon from Sitka, and they look pretty shoddy. They are OK in the garage, but the mantle, no way. Maybe these days the process has improved and the preservatives are better. I dont know.
If you do your homework and find a good taxidermist, he can make a mold out of your fish (I think that is what Bardo is up to), or cut and hack an exisiting mold to match the specs of your fish.
Gary Wilgus from Marysville just did a 24" Brown for me that I released last summer on the Madison in Montana. It looks almost EXACTLY like the fish in my photo. Jaw hook, head shape, coloring, and he was able to shape the mold (not sure how) exactly like I wanted it. (Taking a fly off the surface), instead of just the normal straight on the wall mount.
Anyhow, look him up if thats what you are interested in. He does skin mounts also, but will recommend a replica.
By the way, he is doing my 42X23 buck steelie I RELEASED on a north sound river a couple years ago now. Pictures and measurements can be stored much better for future mounting (as opposed to freezer burn) when you can afford an 800 dollar mount!