Eagleuno 
2010 Nissan Frontier King Cab SE 4dr King Cab 6.1 ft. SB (2.5L 4cyl 5M)
GREAT TRUCK!!
 This is my second Frontier. I have owned Toyota, Mazda and Nissan trucks in the past.  This is a much bigger vehicle.  I am getting 24.9mpg with a range of 420 miles!  Very solid feel.  I got the SE with a manual and the power package.  (This was a HARD to find combination!)  The throttle by wire takes a little getting used to but it works great.  The turning radius is about 4' larger than the pre- 2005 models but again, this is not a small truck.  It feels more like an Ford F150 but it gets almost 25mpg.  And that is mostly city driving to boot.  The manual transmission works great and really lets you maximize the mpg.  I wouldn't get a 4 cyl with an automatic transmission.