Is there a way to automatically show the minimized window when I select it w/ command-tab?
No, but you might try using the Exposé command, F9 (or fn-F9) in these cases. That will show you all of your open apps in the Dock, all of your active windows, as well as all minimized windows. After pressing F9, you can navigate to any window, active or minimized, using the arrow keys.
If you're using Spaces, F9 will only show you the open and active windows in that Space, but it will also show you minimized windows from other Spaces (and it will show the Dock and all open apps).