Great opinions above.
Not sure if you saw this.
Dude! You need a kayak shipped? You have a whitewater dealer offering a sale on Jackson kayaks this month only 1.5 hours from you! They are in Dayton, OH. Check out thier website Welcome to Whitewater Warehouse - Home Sounds like you can get all your questions answered there. Which type of boating you want to do will greatly effect which boat you will want. Looks like they take alot of trips and offer classes, go take a class! And it looks like they offer demos so try a bunch of boats out to see what you like!
Also check out American Whitewater for WW rivers in your state. American Whitewater - OH State Rivers
Count your blessings because you have a hell of alot more WW rivers in OH than here in IA and you're alot closer to some awesome rivers!
Also check out this ohio club, not sure if you have to register to post or what, but might be worth a look. Dayton Outdoor Adventure Club • Index page
If you're wanting to mostly playboat, I'd get a Jackson Star or Rock Star series. If you dont want to play at all, get a river runner like the Jackson Hero. If you want to run rivers and mabe play a little, go with the Jackson Fun series. All are great boats! I wanted to mainly playboat, so I started with the smallest playboat I could fit in!
Also, you might try the google search engine some time, you can find a ton of information just by typing in "ohio whitewater kayaking"
Good look and have fun!