@Ghuncha
Regarding mega Squirt I have no experience with it as I have yet to use it but from what I read about it it sounds promising and the same goes for the ONT VAFC
All I can say about Vtec controllers i that it adjusts the point at which the engine switches from the Lo to Hi cam during acceleration, as well as when the engine switches from the Hi to Lo cam during deceleration.
@Usman
Well this is waht I believe, "You loose some to gain some" Cheapest is not always the best way coz by going the cheapest route you might ending up blowing your motor and it becomes the expensive route. So I recommend getting Microtech which is one of the cheapest ECU in the market with a good track record. It will handle all the parameters that you will require to cover while turbo charging and give you room for expansion also. And I believe @Fli-GTi has vast experience with the Microtech ECU tuning