Also, I'd like to point out the huge benefit of going gigabit. A marginal price increase gives you 10 times more speed. CAT6 cable is a few cents more expensive. Gigabit switches are not that expensive either. Cat5e might work where as CAT6 has a better chance of reaching those gigabit speeds. Also, not much point in going above gigabit at the moment. Most hard drives speeds don't exceed 125 megabytes/s (1 gigabit/1000 megabits) except the very very nice ones.