WANTED: Best FORTRAN compiler for SCO UNIX/386 3.2.2 ODT 1.1

[V P Demikhov]

We are converting a large (300,000+ line) system of FORTRAN & C routines
comprising an image processing system donated in source code form to our
laboratory from a large national science agency.  Can anyone give advice
about which compiler & vendor is the most reliable, bug free, capable of
generating code for large data spaces and large code spaces?