In the main calendar window when you see the "to do" and "events" list at the bottom. Would it be posible that these two lists show you the N-amount of days that you have selected in the "event-list" window as the default (see bug 5847)? That may make the main window to use more resources, but then there wouldn't be a need to keep the "event-list" window open just to keep an eye on the things comings.
This only affects events as todos works always based on today.
Implemented in 4.7.4.9. New parameter to define how many days to include in the event list in the main calendar. This is separate from the event list extra days value. This is not needed on TODO windows since that shows all not completed TODOs already no matter what day is selected..
in 4.8.0