I'd suggest the resort dive. If you want to continue, I recommend getting certified at the resort, unless you live in Florida. It cost about a grand cheaper to get certified at CN than here in GA. It took us a whopping 3-4 hours after dinner one night to get all of the "classwork" out of the way (which we did in our room, adult beverage in hand). The rest of the time we were diving. The certification was done in less than two days and we were able to get 10 more dives in afterward.
Jamie & David
CN 11/2005 & 10/2008 & 11/2011
CSS 9/2007, 9/2009, 9/2010, 11/2011, 9/2012, 9/2013