My input would be that you need to put money into an excellent barrel and an excellent lock. The heart and brain of a rifle. Scrimp on either, and you'll be a frustrated camper. Also, I tend towards owning a lock for which you can still get replacement parts without having to resort to the good Mr. Emig making parts from scratch.
Keep an eye on the classifieds here. There are some just crazy good deals now and again. You just missed a Mike Brooks beauty that sold for a very inexpensive price. Bowkill has a fine looking rifle on now for $1250 with a Colerain barrel in it. For $1500 more or less you can find some really nice looking pieces.
I'd look for Colerain, Green Mountain, Rayl, Rice, Douglas (I am sure I am forgetting some here) barrels. IF the rifling is shallow (like .012), then round bottom rifling is okay. Otherwise, I'd go for flat bottom rifling. It is simply easier to get to work right. That said, Colerain's round bottoms are shallow and work super.
Swamped barrels (fat at the breech, skinny in the middle, fat at the muzzle) feel great in hand, and will spoil you if you ever pick one up. Worth the money.
Lots and lots of incredible builders on this forum. Just remember, their hand labor is worth money. Even at minimum wage (unfair to an artist) you can quickly get over $1,000 in labor plus parts for a plain rifle.
I hope this helps a little. Study the forums here. God Bless, Marc