tjcnole
I gotta tel I really do not have a problem with the Spanish barrel thing as long as you follow the guidelines set in the manuals...
I just looked up the Apex again and the suggested retail was way above what I thought you might pay for one. I do not know what you are looking at price wise either but in that price range I would seriously have to look at a TC Omega before either the Apex or the NEF.
Omega
http://www.midsouthshooterssupply.com/item.asp?sku=000318898
Apex
http://www.ultout.com/winchestermuzzleloading-blackpowder.htm
Looking at the comparison of prices here - I would really would like to suggest the Omega - I am biased because I have one and it is an excellent gun. Really easy to operate - easy to clean - support and accesories are readily available.