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

This topic kind of started in my last post so I thought I'd just start a new thread on the topic.

I have read that with the 600cfm on a 360 it starts to loose gas on high RPM's, so i decided to go with a 750cfm. Others have said that a 600CFM is fine.

I also have a stroker, what do you guys think?

It was also advised from someone who knows quite a bit at my shop to look at "Quick Fuel" carbs. I have noticed though that Quick Fuel is around $200.00 more then the others, so I THINK I have decided to stick with a Edelbrock 750.
Even the guy at my shop, when I ask him about the size of the carb he was even like... ahh?? 600? 650?? 700??? around there, and he knows quite about about this stuff. However a Quick Fuel 600, might be a completely different animal then the Edelbrock 600. Whats the difference between the "performer", and the "Thunder" anyway??
Thanks!