The first Firm album made a big impression on me at the time of release and remains a personal favourite. Love Tony's playing. Midnight Moonlight in particular!
I've owned both models. An earlier 80's graphite necked Arpege and a 1990 Passion with the 90/10 neck.
The in's and outs have already been covered in this thread in a way which would put me to shame, so I'll leave it at that.
I consider them amongst the best basses money can buy.