How do you configure the High ISO limits (without going all the time to the menu) I guess you may use U1 or U2 settings?
I don't have U1 or U2 options but something similar. I shoot a D300 and I'm not sure if all the saved menu items are available on lower models.
I have the Auto ISO as the first setting in the "My Menu" option. So changes are just one button and two toggles away. That is my first setting.
I also have 4 settings in my "menu shooting bank" (not sure it lower cameras has this) for (my own names and settings) "Basic", "People", "Super Vivid", & "B&W". Each of these are tweaked for Sharpness, contrast, color and hue. Within these settings it saves the settings for Auto ISO. By selecting any of these, selects the last used settings. (You can guess what happens but that is why the Auto ISO is the first item on the My Menu.)
For example, for my "people" setting I set the ISO to 1600 and shutter to 1/80 since I use a 50mm, 85mm, 105mm VR, or my 70-200mmVR 90% of the time. Sharpness means more than noise. For my "Vivid" setting, I have the Auto iso turned off and set to 200 since this is what I shoot landscapes on a tripod with. B&W - 3200 iso, 1/60 shutter (with yellow orange filter :)- for friends in low light.
@Correlli - I shoot the same way when lighting is difficult or when I have time to change settings. I still shoot Film with a range-finder and FE2 for fun and that is how you shoot since there is no other choice. Nothing wrong with it at all.
For all - I have commented many times how I love and never leave home without my Expodisk. If you shoot JPEGs it makes a ton of difference and give me more latitude in post. The other option I have recently pick up was a Promaster 'lens cap' white balance. I lost a lens cap and got this for a couple of bucks more. I have tried a few of these and all were disappointing but the Promaster has proven to be ok/good enough for non paid photos. While it is not as good as the Expo, it is good enough for friends and family. I keep one one my 35mm 1.8 and 50mm 1.4G.