Ok i finally saved enough for the EZ EFI. Before I jump in I would like anyones input on what else I need for it i.e. ignition, block off plates etc. Pros? Cons? Will I be able run a turbo or super in the future (doubt I'll ever get that far but it's always a thought). Are any of the other systems, holley, edelbrock, powerjection, accel, etc. just as good or are they all the same just customer service is better with the EZ system (from what I can decipher from this site)

I plan on running it on my 426 hemi. standard orange box mopar igition. MP distributor (recurved). roller cam. around 500 hp and 500 ft lbs