I've tried them all, and have the scars.   I'm really surprised no-one
mentioned Component Software's CS-RCS.  I swear by it.

SourceSafe is an oxymoron.
The P in PVCS stands for painful.
SCCS is great, but to the layman it is too much to grasp.
RCS same as SCCS, but upside down.
What is CVS?

So last year, I came across CS-RCS, and it truly makes
me happy.  It does everything I want, and more.

Advantages:
Simply right click on a file and up pops a context sensitive
menu based on the file's status in the RCS tree.  It is full
featured and slick.  Also, the repository is basic RCS, thus
multiple operating systems can use the same tree.  CS-RCS
even does the line break conversions, gratis!

Single user: free!
Workgroup: $75/person

You really can't beat it!  It's also got ZDNet and SoftSeeks
Editor's choice awards.

http://www.componentsoftware.com