Just bought a 45U rack from 4cabling.com.au

Price was approximately 1/4 of what Dell was quoting.

Once I got the new rack all I had to do was move the vertical rails in a so they matched the current Dell rack and all was good.

In view of the foregoing I'm currently trying to figure out how to cable a rack so it looks good and found a couple of links that help explain it well. Some good tips:
http://www.oreillynet.com/sysadmin/blog/2006/02/cable_management_done_right.html
http://content.techrepublic.com.com/2346-10879_11-6137.html