It's one thing buying a dslr online but you don't rely on support online - I finally went to Nikon because of its fantastic backup support in my country -Pentax has nothing.
My 17 yr old (new to the dslr game) bought a 5100 and yes it's build is inferior to my D7000 but heck that's that's the only real difference - it churns out IQ and focus accuracy easily equal(sometimes I think better) than my dslr.
I also feel that it does slightly better at the upper 3200 ISO levels.
It also has a great learning mode and the articulating screen definitely comes in handy and it's nice and light too.
My son decided on it over an equivalent Canon as he felt the Nikon was better constructed.
The kit lenses are nothing to be sneezed at in the IQ dept (besides a nervous bokeh) - they provide exceptional contrast and sharpness.
Below are 3 newbie shots taken by him in auto jpeg with the 18-55 kit lens
Better than any p&s