Turbo Lude????

My boy was told at our shop that Ludes don't shell out alot of boost due to the ecu won't give out more fuel.he has a 99 prelude.wanted to go turbo but might sip on the juice now due to complications.the guy said that if he wants get more power from a turbo kit for his lude he'll have to buy a new computer like the hondata system.but told him all inall it will cost installed and programmed bout 5 g's.is this true would it really cost this much.Then he was asking me wouldn't it be almost the same or wouldn't he get close to the same results if he bought the AEM Computer or the Greddy's?he wants to run 12 lbs at max. I would like to know to.especially if the AEM computer is a good buy so I'll buy that for my b20 swap instead of a stock ls ecu.