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Dave, it basically boils down into two camps.
1. DSO imaging: Use DSLR, DSI/Starshooter, modded webcam, dedicated CCDs
IMO.
DSLR, easy to learn, great results for the price. Second hand 300D similarly priced to a new DSI
DSI/starshooter, realtively easy to learn, greater dynamic range than an unmodded DSLR though imo the images are of a lesser quality. Having said that people like EzyStyles are turning out stunning images with the DSI. Reasonably priced
Modded Webcam, moderately steep learning curve, quality of image is generally may not be as good as the previous imagers, it depends on what type of modded webcam it is.
Dedicated CCD. Steepest learning curve, generally more expensive,
Planetary: Webcams and similar (DSI really isn't suited to high resolution planetary). ToUcam, Neximager, LPI, Sac4.2 and similar.
I've not used a Neximager, but I have used the others and the ToUcam still wins handsdown for ease of use and quality of results. Best this is the ol' ToUcam is cheap as chips in a comparison. But if you get a modded one then you have the option of doing both DSOs and Planetary and luna
You can also get adapters for some of the modded webcams to attach standard lenses to and get widerfield imaging. Problem with webcams is the small chipsize which creates a very narrow field of view. eg a toucam on a 1000mm FL will give a field of view around 0.23 deg by 0.12 deg (roughly)
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