PJ,

Looks like you have asked some really good questions. Decisions, decisions, decisions. Welcome to the hardest part of a pool build. You mentioned that you think you found a good pool builder. Can I suggest that you go and take a look at some of his/her work. Specify some of the things in a pool you would like to see to help you make your decisions.... i.e. pebble tec finish, plaster, spa dimensions, number of jets, cleaning units, etc. That will also give you an idea of what the workmanship of the builder will be. Ask the pool owners as many questions as possible... How satisfied with builder? How long did the build take? If you could change anything, what would it be?

As for my system:
22 x 36 with 9' wide tanning ledge (21k gallons) Deep End = 6.5'
Plaster
SWG system
8' spa with 8 jets (2.1/2" piping)
Polaris 280
Cool Deck Finish

Good Luck