What CCrew said.

Last year I did two charity centuries, a double century and a week long supported tour (averaged about 70 miles/day) on my commuter which is a cross bike. Just stripped the rack and fenders off and it was ready to go. A hybrid may be less comfortable for long rides because of the more upright sitting position and limited bar positions. If you do choose to go with your hybrid, I would think that bar extenders are a must have.