I think most people just don't need them on a house shot. I had the reign of power and it just burned up way too much (I don't see heavy stuff all to often), I suppose they would work for the light handed people. I've never seen an IQ in person, but I've sold a lot of Tour & Pearls and everyone I've drilled one for loves them. They are both special balls in my opinion.
I even tried polishing the Reign of Power and didn't like the look I had with it. Which is surprising as I put one of my favorite layouts on it.