It is time to take a deep breath and work out what you really want from the car before making the next step.
If you are making the jump to modify then you will most likely need a FMIC, boost controller, Nistune, hiflow turbo or decent aftermarket, decent catalytic converter, fuel pump and bigger injectors.
If you are prepared to live with the stock turbo you can leave out the bigger injectors and possibly the fuel pump but I would still make sure the rest is done.
Take your time deciding because every time you change your mind it costs more money to R&R parts and then you need to pay to retune.