$400 for two people will basically get you on a party boat for offshore. The New Buccaneer with Galveston Party Boats is a good boat. Also check on the Bluefin in Freeport.
Bluefin was my #1 choice, but they don't have an open trip the weekend I am going. New Buccaneer is targeting vermilion snapper currently.
I decided to book a trip on the Olivia J fishing boat out of Freeport. It is a shared trip for 5 hours. No more than 6 people. Main target of fish is exactly what I was looking for. Hopefully all goes well.