My Fiancee gave me a Pedersoli French 1777 musket for Christmas, which I absolutely love and am planning on using in upcoming Rev-War reenactments. When the tax refund gets here I'm going to add a Brown Bess to round out the collection. There's just something REALLY intruiguing about a flintlock; it just seems so "elemental" even as compared to a percussion weapon. Italian and Indian repro flinters often require a bit of "tweaking" to be at their best; American-made custom rifles and muskets are the best in the world (IMO) but are expensive.
Oh, and yes, there's something very satisfying about sending a 500-ish grain, 3/4" lead round ball downrange - it's like having your own little cannon!
HTH,
vanfunk