The D40X or D60 are a better bet, with a 10-megapixel CCD sensor that produces good results at ISO 100 even by today’s standards. The D40 had a higher base ISO (i.e. one with more noise) and suffered from CCD artefacts in massively overexposed areas (e.g. light sources in the frame).
I still have and use my D60 regularly. In many ways there has been little progress in SLRs since the D60. The new ones have better rear displays and sensors that perform better in extreme conditions, but they are not usefully more responsive, smaller, or lighter. Meanwhile, feature-creep and lost focus have made them considerably harder to use. And despite those new features, useful new features are few and far between. For example, the main thing I miss on my D60 is a built-in GPS receiver, but hardly any new cameras have that anyway.