Call for 3B20S/CDC/CDS help!

[utzoo!decvax!harpo!floyd!vax135!lime!we13!rjk]

We are getting a 3B20S.  As a matter of fact, it's built and ready to
ship, sans the disk drives.  We were given a choice of CDS drives and
immediate delivery or CDC drives and delayed delivery. I am asking for
advice/comments from 3B-experienced people OR anyone with knowledge on
the performance of CDC versus CDS drives.  I'll post a brief summary
of the info here after I collate the info.   Thanx!
						Randy King
						..we13!rjk