Wow....nice woodwork. Is that bird's eye maple? Sure does look mighty purty, whatever it is.

For your imprisoned speakers, I'd build a sliding shelf that would pull out when you open the doors. Similar to kitchen cabinets with roll out shelves for heavy things.

It would be real easy to do. That would help big time. Keeping the speakers in the cabinet will be a big time bummer. I know, I had them like that before and when I pulled them out, I realized how bad they sounded in the cabinet. So if you plan to keep them in the cabinet, don't EVER pull them out or you will realize what you've missed.