I think I'm finally switching to Ubuntu on my main machine. I have two 160GB external drives, currently both with NTFS, currently mirrored (by software, not a RAID). With what and how should I format/use these guys? Currently both drives have about 60 gigs used. I have 80 or so gigs on my laptop. I'd like them to be accessible by Windows in a clutch, and eventually (about a year) I'm getting a mac laptop, so I'll need to switch to that too. But my primary goal is to get a good Linux / Windows formatting scheme for the meantime. They're filled with music and school documents - no applications at this point. I'm aiming to use VirtualBox or similar (any suggestions?) to run Windows, so that might decide their accessibility?

Thanks!