What About Edelbrock 340 Heads?

I have been thinking about getting a pair of Edelbrock Performer RPM heads for my 340 and having them professionally ported. Here is my question. Every time a member asks which head to use, it seems that everybody says W2, W5 Brodix, blah, blah, blah. I don't think I have ever heard anyone say, "Buy a pair of Edelbrock heads and have them ported." Is there a reason why nobody seems to recommend the Edelbrock Performer RPM heads?