I think that digital camera designers are missing a very useful trick.
We all know that lenses have a sweet spot in relation to aperture and image quality. And we now have cameras capable of low noise at higher ISO.
Following Michaels lead, I've been using Av mode and then adjusting shutter speed and ISO accordingly.
So why can't we have a metering mode that does this automatically. This would help us not miss that shot....
Here's how it could work:
Dial in the Aperture, dial in your miniumum shutter speed, have a custom function that sets your personal ISO range you can live with. The mode will then optimises the use of shutter speed and ISO.
If the light is still too low at the preffered max ISO to get the minimum sutter speed, then could have another custom function to decide whether to then reduce aperture or reduce shutter speed.
I reckon this could be a valuable addition to the exposure modes already availalbe (especially if you are all fingers and thumb, like me, when trying to adjust ISO on the Canon 1D series cameras).