Holley carbs. Love'em or hate'em?
I have to echo a lot of what has been said above on both carbs. Still, the question has been asked and my answer is the Edelbrock AVS styled carb or a good TQ.
I had a 600 Holley DP. When removing it from the intake I broke the base plate. The cost was a few dollar shy of a new carb. Outrageous! And not having the money to purchase a new carb, I borrowed a AVS from my boss. The damn thing way out performed the Holley I spent time on. When the time came to return it, LOL, I still had no money. So I went and sought out used Carters. Considering the ultra cheap price and the super inexpensive rebuild kits, I stayed with the Carters and learned them very well.
A Holley has way more tuneabilty in them and that can make them difficult to learn and "Supertune" them in to perfection. But once in, wow! The Carters only get so close since they do not have all the same super adjustable tune able parts available in the Holley.
I haven't had any real problems with ether carb. I just rather use a AVS (OE or Edelbrock) or a TQ. The "race car" gets a Holley. Everything else from daily driver to a very hot street stripper gets a Carter!
Cheap, reliable, holds the tune.