383 Fuel injection system

Im building a 383 stroker in a 98 roller block, im using a SCAT forged steel rotating assembly with dished pistions and shooting for an overall compression ratio around 9.5, im using dart iron eagle 200cc heads with 72 cc ports, the overall horsepower im shooting for is around 450-500, before nitrous. My question is what aftermarket fuel injection system should i be looking at? Ive been looking at the Holley Commander 950 MPFI System, GM Performance Ram Jet Vortec Fuel Injection System, Holley Stealth Ram MPFI System, or an Affordablefuelinjection.com Small Block MPFI System with a 1000 cfm 4bbl Billet Aluminum Throttle Body. Im wondering if anyone has any ideas or preference over these systems or other system that can similarly perform. Im trying to run a street/strip combo with 500 on the street and add nitrous at the track for about 700hp. I want fuel injection for more precise tuning of the engine, fuel economy, and ease of use. I just need advice as to which system to use. I kind of like the affordable fuel injecion systems because they include an ecm, and a distrubitor. But i need some direction before i spring for any of these systems. Thanks in advance for all the help.