I quite like the ford explorer, seems to have a lot of room compared to the Jeep we were given once. We also had a Nissan which was very nice. None of them were very good on fuel, but as its so cheap out there it's not an issue.
I've found Alamo slightly better with cars over Dollar and Hertz way better than both of them - however Hertz are normally more expensive and Alamo are known for the hard sell at the counter, though there are easy ways to avoid the counter with all firms now.