Educate me on the "pro port" please...

Sold the last set of W5's we had and am looking for something similar and it sounds like these may fit the bill..... or not. It seems that there isn't a small block head out there that does not have some sort of downfall. Pourous core shifted low quality aluminum W5's, Indy heads that are leaking coolant, I'm afraid to buy a "used" set of W8's, there are new W9's available, but after our W5's and Stage VI's do I REALLY want to go down the Mopar Performance road again??? Honestly I see why people are putting GM based race engines in A bodies.