Hi guy's i am looking to start a social network site but do not know what script to purchase , there are so many free an paid scripts being sold online and all of them are looking very decent .

Some of them are phpfox, social engine ,isocial ect..

The budget is not a problem , i like to have an open source script that can easily
edited to my likings and such , also must have the ability to develop apps like facebook ,chat with friends while there online ,forums ect... (must be expandble in every way)

Also i want the ability to let people see there facebook feeds on the site so that they do not have to go to facebook every time to see what there friends have commented (is that even possible?)

What do you guys advice to get for such a project