Injectors are only needed if you either 1) plan to run E85, and/or 2) upgrading to R/T Turbos or Pure Turbos.
If you go with aftermarket injectors, AMS Performance offers their expensive Nostrum Energy DI Kinetic Injectors for $1700:
AMS Performance Red Alpha VR30DDTT Kinetic Direct Injectors - AMSPerformance.com
A cheaper and better-quality alternative is the DeatschWerks 1700cc Injectors for the Ford 3.5L Ecoboost for under $1000, which with a slight mod to the connector, will fit the VR30:
DeatschWerks F-150 Fuel Injectors - 1700cc 19S-00-1700-6 (11-16 3.5L EcoBoost F-150)
You'll have to pair that with the AMS LPFP, either the AMS RA338/RA405 or Spool FX-150/FX-180 HPFP, and a Flex-fuel Kit.
It's a rabbit hole I have not chosen to go down yet. With stock fueling, stock turbos, and other mods (see sig), my '17 Q60 Red Sport AWD put down 437 WHP & 502 WTQ on 93 pump gas on a Dynojet AWD dyno. After getting to that level, I invested in suspension & brake upgrades to control all that power.