No idea till now because they just released the D600 which is a Semi Pro body.
If its going to be your 1st DSLR i'll HIGHLY recommend the Nikon D7000.
D7000 is a step ahead of D5100
D7000 is a newer and upgraded model of D90
So when get these when you can start off with something Great. Go for the D7000 you will LOVE it. Guaranteed