Potential twin turbo build, looking for injection advise

Been a long, long time since I posted here...

I'm in the planning stages of a new engine build. The plan is to build a small block Mopar with a pair of small turbos, which should make for a fun street car. I intend to do this in stages over the next few years to spread out the cost and ensure that I remain married.

I'm ball-parking between 550 and 600 horsepower at the flywheel, running a maximum of 14 pounds of boost.

Year one - Fuel injection...I'm looking at the throttle body systems, the FiTech 600PA, 1200PA or Holley Sniper. I know I'll be pushing the limits of the system running a blow-through application with that kind of power. I figure with a rising rate regulator, it should be pretty safe. I'll be upgrading the ignition as well, using either a shiny new MSD or Holley distributor, depending on which injection I go with.

Is there anyone out there that has done this and would recommend one of these systems over the other? I'm leaning towards the Sniper at this point, though I've gotten contradicting information...Holley said it would be fine and one of their distributors recommended that I look at a non-TBI system at anything over 480 HP with a turbo. I intend to pick up a Tanks Inc tank/pump.

Year two, I'll be acquiring the turbos and playing with a stock-ish 360. A forged short block will come the year after.

Any input would be greatly appreciated.