hello i just wanted to get some opinions on which setup would be the best considering performance and reliability

i have a '03 wrx with up pipe, tbe , walboro 255 fule pump and an Ecutek ecu .. i want to get a bigger turbo , bigger injectors bigger intercooler .. im trying to get within the 280-300 whp range .. i was searching for turbos and dont know which one would be better .. out of the VF series what is the best? vf 39 or vf 30 etc etc .. and what size injectors should i get? sti pinks 565? ... anyways i have a few months to save up some $$$$$ that is why i did not go ahead and get my tune with scott this month i rather get all the parts first and build up the motor then get it tuned from him later .. throw me your .02 cents , i will definatlly appreciate it
zach