If you ever have the chance to go to Orlando, FL, definitely check out Islands of Adventure. That park won "#1 theme park in the US/world" in all sorts of publications, as well as the travel channel, for many years in a row.
Anyways, you'll find The Hulk and Dueling Dragons. The Hulk is AMAZING and it'll definitely catch you by surprise! Dueling Dragons is a double-coaster, with two inverted tracks curving in and out of each other. You can also pay $20 more to go to the next-door park (they're connected) which is Universal Studios, which also has The Mummy (sort of a roller coaster - it's indoor with special effects). There's a LOT to do at both of these parks, on top of the coasters. Unfortunately, the lines are pretty long.
If you can make it to Tampa, FL, we also have Bush Gardens here. Roller coasters include: Kumba, Montu, Shiekra, Python, Scorpion, Gwazi, and Cheetah Chase. On a normal, not overly-busy day, you'll spend 15 to 30 minutes in line, depending on the coaster. Here's a quick run-down:
Kumba: Standard steel coaster. Long train. ~50 MPH max. On of the largest single loops of any coaster.
Montu: Inverted steel coaster, floorless. ~65 MPH max. Tallest inverted loop in the eastern US, last time I checked... but Dueling Dragons might win.
Gwazi: Dual, dueling, wooden coaster. Two sides - Lion and Tiger. Lion has more vertical movement, Tiger has more lateral movement. This is my personal favorite.
Shiekra: Ultra tall, vertical drop coaster. This has two 90 degree drops! Short train, ultra wide (8 seats per row). Floorless. Has 1 loop and splashes in water.
Scorpion: Pretty much a kiddy coaster. 1 loop, 1 helix, you're done.
Python: Small. 2 loops, you're done.
Cheetah Chase: Non-banked kiddy coaster. Even though it's kiddy, it makes you think you're gonna die! Single cart, no train.