600cfm or 750cfm? That is the question??

I'm running a 750 holley on my stock 360 and it's running great after a little tuning. I've read quite a few threads about people having problems with the eddy 750. seems to be limited to the 750 though. Bigger and smaller seem to be fine. The quick fuel will have a ton more adjustment built into it which is probably why it cost more. I went with a proform 750dp and have been very happy with it. It has ( most likely the qf also) shaved choke horn, billet base plate, four corner idle, secondary idle speed leaver, removable air bleeds and god knows what else that I'm forgetting. All that adjustment make you able to tune to all different types of motor combos. My car ran like a fuel injected car. Idled great and you hit the throtle at any rpm/speed the ***** just went. I guess it really depends what combo your running and how you intend to use it.