Good luck on your cab. Looks good so far.
Just a heads up...
The cabinet I made (3+ years ago) was also for my wife (although it was a xmas gift instead). Galaga was her game of choice. Once completed, she played for a bit, but soon lost her zeal (less than two weeks I would say).
So I kinda claimed it. I replaced the PC and put on a 2 player 6 button control panel instead. I don't think she really minds, but she will occasionally pull 'rank' when my buddies are over and interrupt our XMen vs SF tournament to watch her play galaga.

Don't get me wrong though, she does like the cabinet. And after discovering some of the 2 player puzzle games, she plays a lot more. She must enjoy beating me!
--JamIt