As much fun and good practice as it would be to mix a project with 60-80 tracks, IMHO, it may be benificial to keep the track count down to accomidate for various members DAW's. I've never dropped in more than 25 tracks on mine, so I'm not sure how much more it can handle. Also, don't the 'lite' versions of pro tools have track limits?
But, yeah, hard rock with a track count accessible by the majority on the board, would indeed, rawk!