Don't forget about any of the platforms out there in .45 Colt. A Marlin or Puma in .45 Colt can really put a hurt on a deer. Even though I have a .454 casull Puma, I have shot the Buffalo Bore .45 Colts out of it - it still thumps you and the deer pretty hard.
Before I forget, if your particular Puma is already acceptable, you can send the gun direct to Williams - they are a decent outfit that does quick, good work. They can set you up with peep rear sight and fiber optic (or whatever you prefer) front sight. They put a set on my 9422 for me and the...
+1 on Steve Young. Besides being a great gunsmith, he is just a nice guy that works with you to figure out exactly what you want.
Steve rehabbed a new Puma .454 for me. Not to bash my new gun, but it just felt/sounded horrible when I worked the action. He polished and cleaned up everything...
I have one and love it. I have 250+ full power .454 loads and about 100 of hot .45 Colt loads through mine. The resource that turned the trick for me was an article on GunBlast by Paco Kelly Legacy 92 .454
I can't say enough good things about my rifle. I did spend some $$ and send it off...