my experiance has only been with the 51 navy conversions, both Kirst and R&D. I like the R&D mounted conversion ring better, but eigther will work well. I have no experiance with the drop incylinders.
If I was looking for a woods packing gun I'd probably stick with the 51 navy or 60 army in cap and ball and seal the caps with wax like the originals were or just use a single action cartrige gun.
Any of the colts or remingtons can be made reliable, but few are out of the box and neigther will be as reliable as the ruger. That's not to say they wouldn't work perfectly fine though. The only way I would buy a Ruger is to convert it to cartrige and have a "off the books" gun. Not that I need one, but it is an exceptionaly well built revolver, very reliable, and perfect for converting back and forth. However it has no history to it and I don't care for it. It would make the ultimate woods gun though, you could shoot cap and ball or use the conversion cylinder in 45colt and you could stake your life on it.