Carter, Edelbrock, or Holley?

I too would like to know what is wrong with the Edelbrock 750 Performer since I already bought one. I had no performance problems with my Holleys but plenty problems maintaining them. I had several "backfire" and had to be rebuilt. They also leaked and were new. My experiences with Holleys were not good but I recognize for others this has not been the case. Whey would the Edelbrock Thunder AVS be better than their Performer?