Do you work mostly with MIDI or Audio?
If you work with Audio then it would be better if you could get your PC from home to the school - the HDs on a laptop are slower than those in a desktop so the audio bottlenecks much faster than with the faster RPM HDs
If you use Audio I would recommend trying to find a laptop with 7,200 RPM HDs although I am not sure if they exist... Failing that you may want to look into Firewire external HDs...
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