Colt Model 1851 Navy clone, .36 caliber
--
-I don't know if you were talking .36 caliber or what, but I assume so.
Anyway, here's what I would do in your situation:
Don't buy an expensive gun or two expensive guns.
First of all, the Uberti 1851 clone is the better of the two ("two" meaning the Pietta gun and the Uberti gun). BUT, the there is absolutely nothing wrong with the Pietta-manufactured gun. I believe the Uberti is CNC machined vs. the Pietta being a forged casting(??) [someone that knows for sure, please chime in here]. I marvel at the beauty and balance of my two Pietta 1851 Navys every time I see them or handle them.
Anyway, what I'd do is get two of the cheaper Pietta guns (check online at Cabellas, Midway, Bass Pro Shop, etc.). Get the cheapest ones. If they online data is not complete, call them up and get info you need. If you live close to one these big stores, swing by there and get them to pull every one of the guns out of stock and go through them until you find the best looking guns.
Taking the guns apart and reassembling them is quite easy. Get online to Brownells, Midway or somebody and get a nice gunsmiths screwdriver set, a Brownells 1" brass/nylon faced gunsmith's hammer, a few gunsmiths Arkansas stones and get a set of inexpensive needle files somewhere (buy the good ones later, because you'll tear up the cheap first set). Also, for the files, get a fine file card (a brush made especially to clean junk out of a file's teeth) or a soft stainless brush to keep them clean and get a box of white kids' chalk to fill the teeth with. The chalk keeps metal filings from clogging up the file, which can damage your work and the file. Keep the files clean and chalked up real well.
Get some online info files and learn how to tune the guns up yourself. Some companies, such as EMF sell a replacement parts kit for the Pietta Navy consisting of a hammer, trigger, hand (complete), bolt spring and mainspring, I believe, for about 25 or 30 bucks or less. Get one or two of those to keep available in case you screw up one of your parts Now get to work tuning up your guns yourself! You will have infinitly more fun than dealing with some "original" Colt brand weapons that cost so much more and which you are reluctant to work on. The Navy Colt (and all these single action revolvers, really) are pretty straight-forward and simple. However they can be deceptive in this regard, because there is a degree of precision required on your part in order for these guns to function properly and safely. So, learn all you can about them online and at the library to ensure you know the extent of what you must do once you take them apart.