RE: Southwest Seafood
I can think of three places that are really good in the PHX area, all of which I can attest have great seafood.
1. Taylor Chowder House, a back east-type seafood restaurant, that serves great chowder and whole belly clams. Their address is 3538 W. Cavalier, Phoenix
2. Seafood Market and Restaurant, 1910 S. Gilbert Road, Gilbert, authentic clam chowder
3. San Carlos Bay, 1901 E. McDowell Road, Phoenix, really good Mexican seafood restaurant.
I think any or all of the three would be good ones for you to experience. I'm sure there are a few more but none that I've experienced personally other than these.
Have fun and enjoy.