My wife and I had a second hand 2000 ZX2 for two years and put just over 50,000 miles on, it was a great car until someone ran a stop sign on my wife and totalled it. We replaced it with a second hand 2000 Cougar V6 (same thing as the contour) that ended up having the least overall cost of ownership of any car we've owned over 5 years we had it.
The Cougar ate a deer and we were in search for either another ZX2 or Cougar. Turns out we picked up (less than a month ago) a NICE low milage 35th anniversary edition Cougar (#188 of 3000). In my area the Cougars can be had slightly lower than book, and the ZX2 are a good bit over book, this is mainly due to the fuel economy of the two vehicles (which is mainly due to driving type).
The ZX2 is geared for a very powerful bottom end pull for fast take offs, and the 4 cylinder makes for good economy when doing such in typical city driving. The Cougars have less take off, but are geared and designed more to have outstanding long term high speed highway usage.
The ZX2's optimal speed for fuel economy was about 65-70MPH in fifth gear. The Cougars hit their optimal fuel economy at between 75 and 85MPH. The Cougar spins less RPMs at the higher speeds are are better built for it on the long term.
With the ZX2's snappy take off and the Cougars somewhat boring take off, the ZX2 gets better fuel economy in city type lower speed driving.
For us the Cougar is the better choice as most trips are over 20 miles with 95% at freeway speeds.