If you live where a Flint lock is required get the best you can and have an experenced person help you untill you understand it well. They are a much bigger problem to get and keep working right than a cap lock or and inline.
If you can go with an inline check out the Triumph that is simple and easy to load and clean and comes out of the box with good hunting accuracy with a number of loadswill shoot in it. The Triumph is designed for a scope.
If you must use iron sights the check out the Omega that will be coming on the market this year.
Some people have trouble understanding that in most circumstances you get what you pay for and what is made cheaper will show it at some point. Lee