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?
In addition to Cpearce, which was very accurate, a lot has to do with goals of the plan on the upgrade. I highly recommend ported Edelbrocks. However, there are also other choices that may fit the bill cheaper. There is some talk going on at another thread and Promax came up with there CNC “Shocker” head with 185cc intake runner flowing at 285cfm for $2,025. They also come with a 2.08 intake valve.

If you already have the Edelbrock head, there’s a few places to send it to.
Modern cylinderhead for there CNC program.
(Probably the best in the country.)
Ryan @ Shadeydell in Pa. does really nice work as well.

Start adding costs up and know the level of power possible with said head flows. Here you’ll find the MP W series heads stomp the current aftermarket “Stock Replacement Cylinderhead” a new mud hole. M
They are pricey like all the others are but there power level should be much greater than the stock replacement heads. At this point as well, nobody purchases a W series head and goes mello on the rest. Your really out to make the most of a combo with a W head. If not, don’t bother. The Edelbrock and other heads will rock the street, no problem. But they are performance limited. And cheaper, As such.