Command-W & Command-Q are too close to each other

In Safari (and all applications) Command-W & Command-Q are too close to each other. I often hit Command-Q when I meant to hit Command-W, causing Safari to quit without warning. So, I'd like to see a simple dialog pop up before quitting Safari asking, "Do you really want to quit?". Most other apps warn you before quitting an app if you haven't saved, so no big deal. In Safari, I might have a few of windows open with a dozen tabs, and thus I may not have anything to save but a lot of time, which is reason enough for me to pop that box up, unless there are no browser windows open.

Any suggestions?