With the moon and cloud around, I went over some old M83 data and came up with my latest attempt. I can't remember how many hours of data I collected, but i think this is around 6 hrs (10min subs @ ISO800).
Details
Scope: 8" Newt
Mount: EQ6
Imaging camera: unmodded Canon 400D
Guide scope: 60mm f/11 Tasco refractor
Guide camera: unmodded Toucam
Guiding done by PhD
Lights, darks and flats stacked using DSS. Processing done in CS3. I used the blue channel as a synthetic luminance image.
Link to larger version (2MB)