Not a Mac person but I have had a Linux box somewhere on my network since 1997 or so. I had to go through the same PC upgrade when I went from a 20d to the current 7d. Twenty five mBytes is a big image to deal with.
I had been holding out for a tablet too (great minds, etc) so I bought a CTH-470 at the same time. I’m really happy with the new setup but haven’t fully migrated to it because I’m spending a lot of time taking photographs (first world problems).