hi i'm planning to buy the 13" black powerbook in a couple of days. but when i browsed this forum i found that there will be a mac 10.5 leopard coming out soon spring 2007?. if i buy the mac now which is still using mac 10.4 tiger (*far as i know, i don't really know about it so much), can i upgrade it later into mac 10.5 leopard? or maybe should i wait until it comes out and get it? thanks for your help guys.