I'm sure a slightly lifted miata would be a blast on a forest road.
A legacy would be better though: http://jalopnik.com/a-subaru-legacy-just-put-legions-of-jeeps-to-shame-off-1787234886
Jeeps are still going to be far superior on tighter, muddier trails. That said, I have a Jeep in the garage as my play car, and I'm 90% certain that when I replace my DD within the next year or so it'll be a Subaru Outback. It's about the perfect car for where I am in life, and there aren't too many places I want to go that the Outback couldn't handle.