Optimal keyboard shortcut for keyboard layout switching on OS X? Considering that Spotlight is already using &#x2318;+space and that you cannot use combination of modifiers alone, I would like to see an ergonimic alternative.

I can't use the following combinations due to conflicts with other software


ctrl+space - auto-complete in IDEA
I use ctrl + &#x2325; + space. It's typeable via left hand, doesn't collide with the search window shortcut (as &#x2325; + &#x2318; + space does) and I haven't found any other overlap yet.