Of the production Flintlocks out there.. you need to look at how you hunt first. Are you a stalker, meaning do you walk all day. Then you need a rifle that is not as heavy as some of the others. If you park in a blind, then a more heavy rifle is not a problem. Do you hunt open areas or thickets? Barrel length might be taken into consideration. Are you traditional to the degree that you want to shoot roundball and roundball only? Then you need a roundball twist. Or do you want to shoot conicals or sabots? Then you need to look for the twist that will best accomplish that.

Some rifles to consider;

Lyman Deerstalker
Lyman Trade Rifle
Lyman Great Plains Rifle
Lyman Great Plains Hunter
Traditions PA Pellet
T/C Firestorm
T/C Hawkins
Used rifles

Or if your wallet is fat.. then look at some of the high end Tradition Rifles like the Shenandoah, Tennessee, Kentucky, etc..

If I did not own a flintlock and wanted just one rifle, it would be a Lyman Great Plains Rifle with the 1-60 twist in .54 caliber. I would shoot roundball. It would be my short walks, sit in the blind,and have fun at the target range rifle. If it were for strictly hunting int he woods though, a Lyman Trade Rifle in .54 caliber is sure hard to beat.