Personally, I think a great trip would be out to Six Flags Ohio. If that new flying dutchman comes along, you'll be in for a treat (although I'm not too hyped up about it.)
I recommend going on a weekday, preferrably Monday - Wednesday. Don't try going on a weekend, but if that's your last resort.... Weekends are the most crowded and you'll have to wait in longer lines, plus if you wanna go in the water park, be prepared to be squished.
You'll enjoy the Villain, a great wooden coaster that was built in 2000, Superman: Ultimate Escape which is another unique, great ride, Batman Knight Flight, a floorless coaster with great elements, Looney Tunes Boomtown, which is a great place for kids (if you have any) to play, a great water park (Hurricane Harbor), and if that Flying Dutchman comes along....
But, like I said, only on a weekday will the lines be shorter, and you'll probably enjoy your visit more.
Hope this helps!
Chris