Excellent choice!
The Remington with it's top strap frame design is a stronger design for a cap-n-ball revolver. The sights are crude, but much easier to use than the Colt open frame sights--which use a barrel mounted stud or blade and a notch in the hammer nose.
The Colts are also notorious for having bits or cap fragments falling into the works and if not VERY careful, cocking the gun can cause a couple of small parts to break down inside the frame. It can be a nuisance to buy replacement parts and you will also have to strip the gun completely down to replace them. The Remington basically avoids this with it's different frame design.
I am guessing that you do want the steel-framed version of the Remington. Taken well care of and shot mostly with moderate loads, the gun should out last you and maybe your offspring too. However, the steel framed Remington will tolerate maximum loads better than any cap-n-ball revolver, with maybe the exception of the Ruger Old Army (but since it's not a replica, it is in a class of it's own--besides it costs almost twice what the Remington does!)
No matter where you get your Remington, it will most likely be manufactured by either F.LLI Pietta, or Uberti--BOTH are Italian gun makers who specialize in replicas. In the past, I would have said that the Uberti was better quality, but anymore the Pietta guns are so close that it is a toss-up. You would do fine with either choice.
Midway and Cabelas are two good places to "window shop" on the Internet and compare prices and models. There is just a ton of information that I could set here and write to you, but this ought to get you started a little.
BTW, The proper holster for a Remington is the flap type (left hand) worn backwards on the right side. (Remember how cavalrymen use the saber in their right hand and pistol in their left?) The Hickok holster would look best with an 1851 Navy in it. If you plan to carry the gun (walking or hiking) you want a holster than has positive retention (a strap, or flap) something to keep it secure if you bend over or change position abruptly. Other than that holster choice is a matter of personal preference and taste.
Gotta Go... if you have more questions, let 'em fly.
Either someone else or myself can probably answer you.
Shoot Safely!
WV_Hillbilly
PS You are gonna have a WHOLE LOT OF FUN! once you get that revolver and start poppin' caps and blowin' smoke!