The spanish guns are OK if you get a percussion and keep the loads mild. Problem is the Spanish makers don't proof fire their barrels!!! Also, their build quality is geared toward a lower price point.
If you MUST go spanish, get a Traditions. CVA is really scraping the bottom of the bbl IMHO.
If you get a Flintlock, any of these models, you will likely not be overly impressed with the standard OEM lock. Especially on the Spanish guns, they don't spark too well. This is a combination of poor spring geometry and improperly (ie cheaply hardened with casenit or similar) heat treated frizens. Also frizen to pan fit will leave alot to be desired generally.
The Lyman and Thompson Center flintlocks are a bit better, but most people who decide to stick with those guns upgrade to an aftermarker L&R replacement lock for about $140 US.
The "best" OEM locks seem to be on the Pedersoli and Armi Sport guns, but with those makers, be prepared for a bigger sticker price and using short flints (think knapping) as they have a non-standard lock geometry.
If you buy a percussion model, there's really no reason to upgrade your lock unless you want the ultimate in fast lock time.
If I were looking for an all-business entry level traditional style hunting muzzle-loader, I'd look long and hard at the Lyman Great Plains or Trade Rifle. The Trade rifle is cheaper (and prettier since it's fitted with brasses), but only found in Right Handed models. The Thompson Center is a bit nicer finished, but a fair bit more money.
Inevitably, someone's goign to ask me what I shoot... well, my lineup is as follows:
-Armi Sport Kentucky Flintlock in .45 (mostly for range fun)
-Lyman Great Plains (left handed) in .54 (for serious deer hunting as I'm a lefty and this is the best OEM rifle made for leftys)
-Armi Jaeger 1863 Remington in .58 (a 1975 made gun for range fun and as a hunting loaner for my father - nothing drops 'em like a .58 Minnié
)
