For Claude's benefit, I am invoking the famous Canadian 'notwithstanding clause'...
Notwithstanding the comments about Marc's recent work mentioned by other Braves below; I have a 1998 Acadian in 'C' that is a monster box. Having played a recent example of Marc's from late a 2005 production, I found little difference between them, other than the newer box is louder, required less bellows movement and seemed to have better button reponse with less pressure on the buttons.
I love my Acadians. I've tried lots of accordions, but they are my favorite by far. I've played on at least 20 different Acadians and I loved them all.
I really like Falcons and Point Noire too, but alas, can't have em all