Jetta TDI wagon. Room for all our shit and 50mpg to boot
...and barely enough HP to get out of its own way... I was considering a wagon some time ago as a second vehichle. I found the jetta very week until you get to the V6 which is quite pricey. I found the Subaru TS wagon a much better fit. I think you can get into a stripped jetta a little cheaper but the subaru has plenty of power and is a thrill to drive (even off road ;P).
-earl