Following on from Anandtech's original dual 2GHz PowerMac G5 review, a very comprehensive look at the 1.5GHz 15" PowerBook and OS X has just been published. The PowerBook comes off quite well, although I think most of Anand's love is directed at OS X itself. Something to send your PC-loving friends to read
http://anandtech.com/mac/showdoc.aspx?i=2326
http://anandtech.com/mac/showdoc.aspx?i=2326