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If I was a student that needed battery life, I would swap out my HD for that and add an 32GB flash drive through the express card also.
 
As much as I'd love to have one, it's far too expensive. But once they are reasonable, I'll be one of the first to jump onto that bandwagon!
 
Flash sure is expensive. I was considering an expresscard 34 32 Gb one to flash boot off of... it's $500.
 
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