This is exactly what I needed to hear! I am leaning towards the Nikon. A friend of mine has the D7100 and he loves it.
I own the Nikon D7100 and as I wrote already I think its currently the best crop sensor camera you can get.
I love my D7100 fantastic image quality, with the right lenses you will be amazed at the results you are going to get.
You will find that lenses can be very expensive, it will depend on what you are looking for and how high you want to go price wise.
There are some very resonably priced lenses that will give you excellent results, to make it easier on the pocket I bought used lenses, all my lenses today are used. The lenses I bought brand new I sold.
Few lenses to consider are
Nikon 18-105mm VR
Or
Nikon 18-140mm VR
These are the kit lens for everyday use, they give nice quality pictures for the beginner and medium experienced user
For telezoom I would recommend the Nikon 70-300mm VR, excellent lens for the price, it will give you a lot of zoom and very good picture quality for the price.
For primes I would recommend the Nikon 50mm 1.8G and maybe even the Nikon 85mm 1.8G
The 50mm is an excellent lens for many things, night photography, portraits and general use.
The 85mm 1.8G is considered Nikon second most sharpest lens so the picture quality on it is fantastic but it is not so wide so it will be fantastic for portraits but limited for landscape photography or indoor use.
These lenses are good basic starter lenses, if you want to get the best then the lenses I would recommend are
Nikon 24-70mm 2.8
Nikon 70-200mm VR
These 2 lenses will cost yuo almost 2000$ each as they are pro lenses but the quality on them is second to none.
There are lots of lenses to choose from some third party that actually can be very good, you will need to decide what you want and then go for it.