FYI: If you look at my system, you'll notice that it's not too bad. I experience a 100% processor usage when my print job starts, then after a few seconds and the printer is going, everything runs fine. When I'm running Winamp, playing some MP3s, it skips for a few seconds before resuming normal operation.
In short: If you have printer spooling enabled, this is normal.
<A HREF="http://www.btvillarin.com/phpBB/viewtopic.php?t=329" target="_new"><b>My System Rig</b></A> (courtesy of <A HREF="http://www.btvillarin.com" target="_new">btvillarin.com</A>)