Hey pse-archer I picked up a Lyman Great Plains Rifle in .54 cal. sidelock from http://www.midsouthshooterssupply.com/ and absolutly love it. It really shoots a .530 roundball with a .015 patch and 90 gr. Goex 2F like a tack driver. Heck I know the rifle is more accruate than I am for sure. It is one of my favorites for sure.

Good luck and I'm sure you will enjoy whatever you decide to purchase.