Of course, this thread is going on 5 years old, but I'm still enjoying the Gitane. However, most of the fun rides involve hills, where those 52/42 chainrings aren't so popular.
So from time-to-time, I do think about putting on a compact crank. But right now, the shifting is perfect, I wouldn't want to spoil it.
I think there are at least a couple other forum members with the same frame. If I recall correctly, Chombi1 has a very nice one.