No need any kind of fancy engine management if you dare to tune it by yourself..
I tune my B20B vtec wif supercharge myself, it very easy if you willing to learn how to tune. Only things u have to invest is a WB02 sensor (almost RM 1500 & u can take it out to tune another car)and rechipped my ECU (of couse converted to OBD1), altought I haven't go for dyno yet, anyway I was very satisfy with the result,atleast you can adjust air fuel and timing and much more things by yourself w/o buying VAFC/ATC or even a microtech....
I still saving money to buy notebook for datalogging, currently learning how to connect WBO2 to a palm. Do you know that Vtec ECU can connect to PC/notebook for datalogging purpose. Honda ECU is the most flesible I ever know, Even can add a 850cc or injector w/o changing anythings to your engine management system.(maybe only the map sensor...) so u can increase the cc. and even go for boost anytime.
just my experience....