I have had my iMac for a week now and i'm pretty happy with it. It came with the Drop In Disc to upgrade to Leopard, and the two 10.4.10 OSX installation discs. If i pay for the Up To Date disc is it the same as the £85 version with the fancy holographic box, containing the full version of Leopard? Where as with the Drop in disc is just an upgrade? If i had to restore could i use the Up To Date disc or would i have to use the 10.4.10 disc to revert back to Tiger then use the Drop-In Disc again to install Leopard? Replies appreciated, cheers!