Fair enough. I just wanted to make sure you'd at least considered the advanced class and it seems you have.It's not that I don't want to do advanced really, but the instructor I did OW and Nitrox with wanted us to have 25 dives logged before we took AOW. I'll get there this year easily, but I thought it would be best to get maybe a few more than the minimum before I moved on.
I've done two dives with analog gauges, and I always do a dive plan before I dive. I want to buy gear that I'm going to be happy with for several years and not wanting to replace next year...
I still think a BCD is a better first investment than a computer or regs. Like I said, I think you'll be better off using the tables over a computer for a while and really getting to know them. Not just how to use them but develop a gut level familiarity with them. Regarding the reg, as a novice I doubt you'll really notice the differences yet and they'll all seem pretty much same when you're using them. The BC is where biggest configuration differences can arise: rear inflate, jacket style or BP-W; integrated weights or not; Where and how to attach the console and octo. In the end it's not going to matter which console or octo you have on your reg, even if your using a rental, as you should know exactly where they'll be and can find them without fumbling around when you need them. The only way to get that familiar with it is to dive the same BC and fine tune it to your liking. Besides if the shop is going to sell a reg that you already like in may, get the BC now and wait for the sale to get the reg.