Depends what you want to spend,
Big thing is the number of megapixels, I would go with something that has at least 3.5 to 4 and you will will get quality pictures.
second thing to think about is how easy the camera is to use, which comes down to personal prefrence.
If you like the feel of a 35mmslr camera and want the ability to change lenses, digital cameras are available that will use lenses that fit film cameras.
For instance, Canon makes four slr digital cameras.
The Eos D-3O, D-60, Eos1D, And Eos1DS. All of these will use the same canon lenses as their 35mm slr film cameras.
The Eos D60 has 6megapixels and sells for about 2500.00, the EOS 1Ds has 11megapixels but sells for almost 8000.00.
Hope this helps