Welcome Kirk.
There are a lot of folks offering kits so it won't be hard to find one. That said, you might have some difficulty deciding which one you want to get. At the moment, probably the "hottest" kit going is one currently being offered by Jim Kibler.
https://kiblerslongrifles.com/coll...outhern-mountain-rifle-kit-gun-base-price-950
With this kit, Jim has bridged the gap between the mass manufactured kits offered by T/C. CVA, etc. and the more traditional kits offered by folks like Jim Chambers, Track of the Wolf, Tip Curtis, Dunlap Woodcraft, etc, etc. which take more work and a more experienced builder...or at least someone willing to do a lot of learning along the way. The only downside to Kibler's offering is that at this time, he only offers the single style so if you're not interested in a Southern Mountain style rifle you'll need to look elsewhere.
He also does not offer a LEFT-hand rifle kit.
You'll definitely want to pick up some books, perhaps a video as well. As already suggested, Track has a good selection.
As to rifle particulars, since you asked for opinions, I'll share mine, with the caveat that they are just that..OPINIONS...and worth what you paid for them: :wink:
1.
Barrel...Rice, match grade, square bottom rifling.
2.
Lock... Chambers, Deluxe Siler.
3.
Stock...Go for as fancy a piece of wood as you can possibly afford. This is the one place that you can really improve your finished rifle's appeal for the least amount of money and work.
A little extra money spent on wood really pays off in the finished rifle.
ENJOY the journey. :thumbsup: