Switching between 2 DVI signals on 1 monitor

I have my PC connected to my monitor via DVI. I also have an Xbox360 connected to the monitor via HDMI -> DVI. I can only have one connected at a time so it means I'm constantly swapping the cables in the back of the monitor.

What's the best solution to this, so that I don't have to keep swapping cables? Perhaps pushing a switch or something to change where the signal is coming from on the monitor..?

One solution is to get a DVI -> VGA converter for my Xbox360 hdmi->dvi cable, so that I have both a VGA (xbox) and DVI (pc) signal going into my monitor, and then I can switch interfaces using the monitor's "source" button.

But what's another solution, assuming I don't have VGA on my monitor?