Leopard's on the way

My brother's just placed his order for a 20-inch iMac with Leopard, of course. The problem is, it's going to take approximately two weeks for it to get here. I think that's too long a wait for me. Maybe, I'll get my own copy of Leopard for my Macs rather than wait to have a go at using my brother's Mac. I'll be asking my source for info on getting the Leopard family pack. I should start looking for a hard drive for backing up my old data on my iMac and Powerbook.