I've been lusting after an FD 35mm f/2 for some time now, but honestly I don't think I can afford it anytime soon. Too many other things in the meantime.
Anyways, the FL 35mm 2.5 seems like a good compromise; half a stop faster than the FD 2.8 and probably can be had for cheap.
The main consideration I guess is whether or not half a stop is worth it, and if I should just get an FD 35mm f/2.8. I haven't checked those prices yet.
But, if you've got examples or opinions... be my guest!