I have a Nikon D3100. I love it. It does really well in low light without the flash but YOU MUST GET OFF OF AUTO!!
Now before you get nervous, let me say that the d3100 is super, super easy and user friendly. I brought mine last may right before I went to Paris. I signed up for a very easy on line DSLR camera basic class (15bucks) and then started shooting.
PM me and I'll send you the link.
I am never on auto any more. I primarily use the A function or the Manual setting.
My kit was 700 bucks and I got a zoom lense and a normal 55 lens.
I am not a pro by any means but I'm starting to get better.
This was my first night time picture. Arc de Triomphe. I had brought the camera only 4 days prior and it was astonishingly easy to figure out. No flash, not a great shot but not bad for 4 days out.
This was inside the "Conciergera". It's the jail where Maria Antoinette was housed before she lost her head
Inside Notre Dame. no flash.
Again I know these are NOT "great" shots but I had only had the camera for 4 days and was able to use figure out the low light shots from reading the manual.