OWC sales a complete new retail box version of OS X (10.4) Tiger on DVD for $119.00 They also sell a Apple Mac OS X (10.4) Tiger Upgrade Installation Set with a MAC OS X (10.3) Installation Set both on DVD for $89.00. They say the latter is for those of us who already have Panther (10.3 or 10.2) I was wondering if one is better off in buying the latter and just doing a upgrade? Any experience with this approach? Hopeful Rick