Electrically, if it meets Cat 5 (5e, 6...) spec, it shouldn't matter much. You'll probably want to avoid Belden DataTwist cables; the color pairs are bonded (which is a good thing for performance, but a pain to install, especially if you're not a pro).
Lucent probably makes the "best" category-rated cable, Belden is great stuff (except as noted), there's a zillion vendors for that stuff...find one you like and run with it.
If you're nervous about it, call Anixter. They spot check every batch of cable they receive for compliance...if the test spool fails (selected at random from the batch), the whole load goes back to the manufacturer. They guarantee specification performance. You might even be able to swing an educational discount.
Good Luck
Scott