Fuel Injection Questons
Yup. Holley has all the support, longevity, and customer service. I'm sure Edelbrock's system can work, but read up on other's experiences with it and you'll see a lack of support and help from Edelbrock. Not because there's anything inherently wrong with the company, but there seems to be a lack of depth to their experience.
Holley has put massive amounts of effort behind their sniper/terminator/dominator systems and there's going to be a much deeper well of experience with those systems in almost every tuner and car community you find.
FAST is part of the comp performance group, which is now owend by Edelbrock. Who knows which 'brand' is going to get to keep their EFI in the long run, but it seems a riskier system to invest in as a result - but that's just a guess.