Al,
I agree with SSharp.. Ask yourself why you want a pool and how you plan to use it...
Some things you need to decide..
Do you want just a Pool, or a Pool with a Spa?
Do you like a freeform style of pool, or more of a rectangular style pool?
Do you want a standard pool with a shallow end and a deep-end, or do you want a sports pool where the depth is the same on each end and a little deeper in the middle?
Do you want a diving board which requires a large and deeper deep-end?
Do you have a budget and are you ready for some serious sticker shock??
There are plenty of other decisions, but those should get you started?
Thanks,
Jim R.