As much as I like Cessnas, we were actually also looking into 182s for a while - this has written 'Mooney' all over it, assuming retractable and one door is OK for you. In the older models, there is not much leg room in the back, for a single adult or kids however still sufficient.
Also, don't let people tell you that they are tight. The seating position is more like in a sports car, and the windows are not biggest, what might have led to this tale. Objectively, the cabin is actually the widest in class:
http://www.mooneyland.com/why-mooney/
In our M20E, with a few speed mods, we are planning on 150 kts TAS at 10 gph (actual is more around 152 kts at 9.8 gph) or 140 kts at 9 gph (also rather conservative). By far the best traveling machine I ever experienced and we actually travel quite a bit.
The 182's fuel consumption is not only much higher at the same speed, the TBO of the older O-470 engines is also only 1,500 hours and overhauls are more expensive due to the 6 cylinder engine. At a given budget, a Mooney would get you quite a bit further than a 182.
If you prefer fixed gear, a Grumman Tiger is another plane I would look at.