Which converter do you run?
How much boost?
Are you looking to buy new or a used Turbo.
Do you know the current duty cycle of your injectors during your runs? If not how much fuel are you adding via the chip?
Its hard to say now but if you answer the above questions we can make better suggestions. You may want to do the 6262 billet wheel unit and some 60%s or 80's if you're looking to upgrade both. You've got it moving the mail as is!!