Paradox , DBase or MS Access

This question has probably been asked here many times but is it worth
Rewriting an existing  Delphi PDox application to use ADO MS Access? (The
customer wants MS compatibility) Which format is best for net working
environment (15+ seats) on  a medium sized DBase (approx 100k records, 30
tables. Current Pdox DB, weighs in at 20Meg when compressed) Should the
customer forget MS compatibility issue over possible problems created by
access networking, crashes etc etc??
Any opinions appreciated.
Tony W