I shoot traditional B/P in competition events with N-SSA, so I have seen, shot, and own several B/P muskets. The muskets used in our competitions must pass tests for safety as well as be 'dimensionally correct'. So, ANY firearm that is labeled N-SSA is gonna be true in design and reliability to the original. Not quite the Good Housekeeping seal of approval, but reasonably close
Have you fired pattern '53? Like most muskets of the period, the 1853 Enfiled has a peculiar 'drop', in this case, very, very shallow. You gotta cock your head and neck like an Egyptian to get the sight line correct. The good news is that the rear sight is placed rather far up the barrel (a boon to us with old eyes!).
Euroarm is a decent musket, however you will need to take the lockwork apart and polish everything, as well as do a trigger job to drop the pull weight to an acceptable level.
Ditto with Armi-Sport.
Stay away from the Packi and the Indian imports. While they WILL provide hours and hours of aggravation, they will never shoot worth a darn.
You might very well skip a few steps and consider a musket from James River Armory. They import un-rifled units from Armi-Sport, get the barrel blanks rifled (seven, not three) by Whittaker, and generally 'tweek' the musket so that it's pretty well ready to shoot. Take a little tension off the sear spring and you are good to go! Good folks to deal with, too.
I used an early English-made Parker-Hale two-bander (practically a re-ssue due to the 'borrowing of the tools and dies' from the British Museam by Parker-Hale) with good success till my neck got too stiff, then built a Fayetteville: more drop, but not as much as the Springfield issues.
Several mini-ball molds are available on the open market for these .58 (actually .577) calibre muskets. You will need to slug the barrel or do the land and grove measurment so that you can purchase the correct sizing die for your musket. I used an RCBS mold sized to .575 (pure lead, with bees-wax and olive oil for lube) in front of 42 gr of 3-F Goex powder. Luckily, the same round and charge works in the Fayetteville.
BTW, the Remington Zouie was a CW musket, issued to several Yankee groups during the war. Some of these originals are in competition use today with good results.
Aim Fast; Shoot True!