I've done the Gauley and New rivers in West Virginia. There are several different rafting areas (Upper/Lower Gauley, Upper/Lower New) that can be combined for 1/2 day, 1 day, or 2 day trips. Both rivers have a variety of rapids from Class I to Class V during the summer. Some of the outfitters (Ace Adventure Resort, for example) have other activities like zip lines, hiking, mountain climbing, horseback riding, etc., in addition to the rafting.
I don't have any other rivers to compare it to and don't know if it's worth coming in from far away.