Kits are fun to build but you might notice that the cost of a finished gun is usually only a little more than the kits.
The kits metal is unfinished which means you will have to do some sanding to remove the tool marks, polishing and then blue it.
Many of the instant blueing products won't give it anything close to the finished guns nice blueing and the cost of having a local gunsmith do it will more than cost the little difference in price between the kit and a finished gun.
On the other hand, if you wanted to "age" your gun so it looks very old, the lack of blueing wouldn't be an issue.
As I'm sure you have read here on the forum, the steel framed guns are the best way to go.
IMO, unless you are wanting to recreate a brass framed Colt style Confederate gun, stick with the steel framed guns.
Don't forget to let us know what you get.