I still find plenty of uses for the Mac (it is a Pro Tools machine primarily, but I also use it to scan from a 5370c). It has OSX, 9.2, and 9.1.1 (for the Pro Tools) as well as an Atto SCSI card and external Seagate Barracudas (18G, RAID_0) in a Glyph Rack with a Plextor CD-R ...
All that said, I spend way more time on the Windows boxes (sounds like you are I are in the same line of work) and its hard to get passionate about one over the other ... I like them all, and the distinctions are part of the fun ... I take my fun where I find it these days ... :)