15 city up to 21 fwy. Eddie Bauer is a good choice, but XLT with leather might be cheaper but harder to find. Test drive a lot. Some trannys don't shift great. Pay attention to it shifting as you come to a stop and on hills. Look at the paint closely, some have had bubbles on the hood and trunk areas. Look at the drip rails on the roof for rust and or bubbles. The 5.4L is solid and has been as perfected as it can be IMO. Drive it on the freeway and notice any steering vibration-some have reported a nibble that is hard to fix. No amount of balancing has help some.

Just a few of the items I recall as being big.