Previous equipment was Celestron Evolution 9.25 with 6.3 FR, Atik Infinity OSC, as mentioned best quality images are gained on EQ mounts with guiding etc, I find Alt/Az suits my purpose of imaging DSO's , my intention was when I started to out to build a library of captured images, most of my early ones are very grainy with noise etc, they are now improving to a standard that I am personally happy with,
If you are happy with your images thats all that matters, some really good advice on SG & Cloudy Nights, but, I have to say the question of equipment is very Subjective, what works for some doesn't necessarily work for others, Trial and lots of errors has been the order of the day for me, the Weather has been particularly poor in the NW England this year so far , but one good night and you forget all the other cloudy nights.
eric