Drew,
The g-star performs very well on deep sky stuff.
Have alook at what Steve does with a g-star,
http://my.hwy.com.au/~sjquirk/index.html
To get results like this you will need to stack many 2.5 sec frames and if you want colour you will need to use filters otherwise they make a good easy way to have ago at imaging using a platform. You don't need to do a polar alignment just a good Alt/Az tracking mount as the longest exposures are about 2.5 seconds.
You will need to adjust your mirror forward up the tube to get focus.
I use the Mallincam video system which is similar just modified/cooled and is one shot colour, here are some results with the Mallincam,15 inch dob on a platform,
http://equatorialplatforms.com/malli....platform.html
the difference is you just put it in the focuser and it displays great views on the monitor or PC via a capture card and has exposures upto 56 seconds with out stacking or colour filters.
If you were/are mainly a visual astronomer like me and want to dabble abit into the imaging side and improve visual experences in the suburbs with out the time and patience of conventional imaging then a Astro video system is the way to go.
I admire the great shots many people post up here and all the hard work that goes into it, but what you are looking at will do the job with out to big learning curve.
Regards Matt.