Need advice on system set up.

Let me start by saying I know little to nothing about stereo equipment and will have a professional do all the install. I am Looking at doing my sound system in 2 phases because of cost.
Phase one is to replace my 2 pair of factory sony 6.5" speakers with 3 pair of either Kicker or Polk audio 6.5".....I will be adding 1 pair in the bow which I don't have with the factory set up.
and then adding a 10" sub either kicker or polk depending what brand I end of going with.
Okay here is my question-can I buy one amp to power the 3 pairs of 6.5" and the 10" sub?
If so what brand and model? Please be specific so I can look for one to buy.

Phase 2 is the purchase 1 pair of the Fusion T-series combos. My question here is what model amp will I need to buy to power those? My next questions will I need to buy addition equipment to tie all this together?

Is this a good game plan? Feedback and advice please.

Call Tom at Texas Stereo. His link is below:

http://www.boatstereo.com/