SeaJay once bubbled...
2. Time to take a vacation and learn nitrox. Then do it again with advanced. There's deco theory in advanced? I'm talking PADI stuff here, right?
Y'all don't like the Hal Watts Deep Air thing then, eh? Certainly there's deco in that class, and it's all about 21% - exactly what's available to me.
Then I think it's time for me to purchase a few tanks... Maybe half a dozen of them... All nitrox tanks. Then, I can make the trip to Charleston or Savannah and get them filled, and it won't feel like a wasted trip.
Then, the next time I do a 100' dive, I've got the right gas and a longer bottom time.
Guess it's time to get an Explorer wing and a manifold or three, eh? And a second first stage.
There goes my bank account.
Oh well.
Skip the PADI course and try to find someone that offers IANTD.
I started out as PADI BOW, AOW, and Rescue. I took a IANTD nitrox course during the same time period as my AOW.
Later, after I had taken IANTD Advanced nitrox, I took the PADI Nitrox course. The reason I took another nitrox course was because I was sitting in on the class with a friend, and the instructor giving the class was another friend. Instead of just sitting in, I decided to participate.
The instructor teaching the PADI Nitrox course is one of my regular dive buddies and was also my partner when I took the IANTD Advanced nitrox.
After the class, we both felt that the PADI course was lacking compared to the IANTD standards. The information that PADI put out was often confusing and my other buddy taking the class would likely have had a hard time with it if not for the "extra" coaching that me and the instructor gave him based on what we already knew.
I have also sat in on a couple of NAUI classes. They seem to be structured better than the PADI class, but IMHO, the IANTD was still more informative. In fact, I gave the NAUI instructor a laminated handout that I made for myself based on IANTD materials to use in his class. That handout simplified the formulas for his students. He since told me that made several concepts much easier for many of his students to grasp.
I also know all three of the instructors personally, and am familiar with their teaching styles. I think this allows me to give an unbiased opinion on which agency offered the best course. For my money, I'd stick with IANTD.
As far as the equipment and cost go, yup, you need to pretty much be prepared to step up a little more. Everytime I think I have all the gear I need, I find myself needing one more regulator, one more deco bottle, one more SPG, one more...