Eduardo,
>> Has anyone ever considered (or if it is even possible) to upgrade the calipers and rotors. <<
If you are suggesting upgrading to the 100 series rotors then that would be pretty tough since they are 5 lugs. Your 80 series has 6 lugs.
-B-
Matt,
I agree with Kurt that you can improve the brake feel with minor work:
1. Make sure the front rotors are in good shape.
2. Make sure the front pads are in good shape. You can use 100 series pads on the 91-92 but it is more trouble and you have to shave some of the surface area before...