If your interesting in riding the coasters, then Six Flags America would be worth the stop just as long as you aren't expecting much. Ride Of Steel is pretty good and although my experience on Wild One was less than stellar it gets pretty good reviews as well. Beyond that, pretty much everything else is average at best. I was there on a Friday in early August and the park was almost completely empty, so despite the way they operate their rides, I was able to get through the park in less than 4 hours. Great Adventure, on the other hand, is one of the best coaster parks in the country so I would highly recommend it. El Toro alone is worth the trip. Have fun, and congrats on your anniversary.