If you just got SLES 8 on a server, your upgrade protection should automatically provide you with SLES9 licensing as well. If it doesn't, your manufacturer screwed you somehow. SLES is licensed yearly - basically about $349 for a 2 CPU server, a pretty good deal .
Why would you EVER use a consumer version on a production box when you have an enterprise license? The enterprise license provides you with support, especially over a greater period of time.
What it doesn't provide you with is the newest, neatest toys, which you shouldn't be worried about if you want a stable production server.
While you're at it, go to
http://www.redbooks.ibm.com - look for a redbook on performance tuning on linux servers. This will tell you more specifics about what you can do with your box.
Jon Johnston
Creative Business Solutions
IBM, Microsoft, Novell/Suse and Sophos Consulting
952-544-1108
http://www.cbsol.com
Blog:
http://bingo.cbsol.com