Since you are using Bangkok Air for most of your flying then you might consider their Discovery Pass. By using this, one can save a fair bit of money. For instance the direct flight from LP to SR (on Siem Reap Airlines)is $277 whereas on the pass it would be around $122 (90+32fuel surcharge/insurance) The pass cannot be obtained through their website. It has to be gotten through one of their offices or a travel agent.

To be honest i like the idea of the speedboat. I would feel more comfotable having something on my schedule. And looking at the pics of Phi Phi i really want to see it.
I contacted a guy, Eddie, that was recommended on the site for a flight quote, he was saying about $700 per person for flights, not sure if that is good or not.
My biggest hurdle right now is finding a hotel in LP, 3 Nagas is out, they say they are booked. I have emailed a lot, am waiting for a response, although i guess my next option is through a booking site- not sure. If i cant find anything then we will go back to the CM idea. I dont want to book flights until I have hotels i think.
I am on opposite time than most people who are posting, so i seem to do my research when yall are sleeping then looking into the ideas and posting late i think- so it delays my response, but hopefully i am getting there. If i did the pass- well does anyone have any numbers of agents they went through?