I had fun with
Flashing Blades! many years ago -- it felt like a juiced up version of
En Garde, for the few people who remember that proto-rpg.
The advantage to FB, as far as this might go, is that it can be deadly, but it is fairly true-to-genre, especially when you are talking Dumas. It gives good due to gunpowder weapons, but also notes their limitations -- they are deadly, but ssslllloooowwww to reload. Most of my players treated them as one shot weapons -- literally fire & forget
I liked the fact that players usually joined regiments or took positions in the church or government (many, of course, aiming to either join the King's Musketeers or become ennobled through worthy acts).
Some people like
The Riddle of Steel for musketeer games -- it is certainly easy enough to ignore the terrible magic system that got short of globbed on at the end. In many ways, this is one of the best dueling systems going -- combat is short and usually quite deadly, pretty much the antithesis of "cinematic". The system they have doesn't map a lot of eras well, but it does great for rapier-and-main-gauche style fighting.
7th Sea is definitely cinematic. It is whopping great fun, but it is more Errol Flynn and vaguely Arabian Nights than Dumas; it is sort of a Western version of
Legend of Five Rings, if you are familiar with that. It is a dice pool system that doesn't get out of hand, which is nice; it is kinda hard to find, as it is out of print, I believe.
Just some thoughts from someone who love D'Artagnan & Co and has dreamed of making his own "musketeers & magic" game where the magic would be based on what people in the early 17th century thought was possible...