That would be the best replacement pump, but unless his car is modded, then that would be overkill, and really expensive compared to the basic water pump, it sure would look good installed though.
That thing ran you what, at least 250.00 to 275.00?

I agree. Overkill for a stock application.

and what about the pump with a cast iron impeller any one ever come up with one?

I can't say as I've seen issues with either one before. If you got either one, it would probably outlast the life of the car anyway. So, your damned either way. IMO, flip a coin.