Yes, I was actually thinking of an in-dash type of system. I haven't done any serious shopping but from what I seen between the system, wiring, install etc. you're looking at about $1000 CDN and up.
But of course easier than than finding the 3rd row and you can get the system you want regardless of what Runner you buy.
This is not that bad.. I would better first get a descent car and do the upgrades like NAV system later (especially this stuff gets cheaper every month