High Output Alternators

Well, its time to get a new alternator for my car. What does everyone reccommend? In my car, with the system totally off, I get dash dim when stopped at lights. To give you an idea of my power needs, I have a Fosgate Punch 500.2, and a POS Phoneix gold 180 W peak amp, in addition to the Empeg, and a Pioneer deck. I had my existing atlernator checked out, pushing 90 Amps, but its just not enough. I am thinking just a 200 Amp will be plenty, with room to get rid of my phoneix gold, and get a new 4 channel amp to replace it. What do you reccommend?

-Mike