Which of these is best in your opinion?

Sony a580? Nikon D60? Nikon D5000? Nikon D70? Nikon D3000?
As far as picture quality, I want a camera that takes beautiful crisp photos and these are all the suggestions I heard at work today. So can you please lend me your opinion

Added (1). And which is best for your buck?

Why are you posting name of old camera, buy affordable T3.

You must be searching for used cameras, as those are all good, but discontinued DSLR's. Of the ones named, I'd recommend the Nikon D5000. But for about the same price as a used D5000, you could get at new D3100.
Here's a detailed review that has a D3100, D3000, and D5000 comparison on the first page.
http://www.dpreview.com/...ikond3100/

And here's a D3100, with 18-55mm AF-S VR lens for $549.
http://www.amazon.com/...003ZYF3LO/

Personal experience: I have and love my D70 and recommended a D5000 a few years ago for a friend. But the D3100 has better image quality than either.