Just so you know, this gave me a reason to go digging through the loft tomorrow to find my legacy head unit. I took the sound system from the Svx and put it in my legacy when it became my daily driver, and i've just not had one since. My original SVX cd and stereo I ebayed, so now I have something until I decide what to do with the sound.
I was thinking about building a computer, but still not sure. I figured that the units could probably swap, and now you've confirmed it.
(assuming you guys have the same connectors that is)