David
maybe you are not comfortable enough, indoor, with your M6?
The white balance is an issue, but shooting ISO 400 indoor is 90% of the time pretty straightforward (no flash for me please).
Also, you seem not to enjoy the somehow masochistic dealing with film.
In that case, really, a digicam seems too best option...
Personally, I love film and will shoot Tri-x as long as I can, even when digital is so much "better", faster, easier etc.
I like the tangible thing, the archivibility, the possibility to get a cheap, high quality long lasting print.
I have starting to shoot family stuff exclusively on Kodachrome because of the film stability. After 12/2010, I will apparently switch to E6 for two reasons:
1 - It apparently is still more stable than C41, and 2 - when you have hundreds of old films, it's so much easier to see the pictures on a light table, and choose to make some scanning/reprints than with negs.
Good luck!