What camera and lens for a beginner?

[MeEsH BaKkA]

I had a second hand D90 this time last year which broke and I sold on to a friend with the kit 18-55 lens on, I'm looking to buy another camera and want to stay with Nikon as I have access to some lens through said friend. I'm not sure if I should get another D90 or get a newer camera with better ISO ability as I will be taking photos in fairly poor light most of the time (night sky, and lots of underground stuff).

I have around £300 to spend on a body any suggestions, stick with a D90?

 

[MeEsH BaKkA]

The next closest (new) camera to my budget seems to be the D3200, any good? It looses some functions and internal focus motor but I assume it will still take better photos than I'm capable of. Second hand D5100 also seem around that price range, what's better?

 

[MeEsH BaKkA]

The D7000 is just out of my price range , The D90 I had before was nice until it broke but it was my first and only Dslr so I don't have anything else to judge others by. What did you mean about the image quality?