I just switched to the red Edelbrock when I couldn't live with the Holley Blue racket anymore. First time I turned it on I had to look to make sure it was running properly 'cause it was so much quieter.
Too soon for any long-term opinion, but the initial impression is very good, and it is available at the local chain auto parts store for nearly the same (very reasonable) price as online.
I'm using the 4-7psi version with an Edelbrock 1406 carb feeding a 5.9L.
