Congrats! I'm going to give it a try this year. I'm not sure which shotgun to start with... semi-auto or pump. I don't want to spend a lot until I'm sure I'll like it.
I did the exact same thing...sold my G17 and got the STI Spartan. The Spartan is an absolutely awesome pistol. Give CDP a try as shooting the .45 ACP will be a new learning experience. Good luck and have fun!