You should really take a look at a Subie Outback from around 2007 or so. Should be able to find one in your price range with moderate miles. It fits most of your requirements and is available in both 6 and 4 cyl versions both of which get 20+ on the highway and tend to be pretty reliable. The interior size of an Outback is comparable to most mid size SUV's and is actually larger than some.
I am on my 4th Outback (5th Subie) and they have proven to be quite reliable for me.
Rick any issues ever with your subarus? My sister has a 2010 forrester, loves it, looking into possibly getting a subaru, they are just a weird company u really dont even hear anything good about them but then again i never hear anything bad about them.