In a spurt of atro buying I picked up 2 CCDs a few months back, namely an Atik One 6.0 with OAG and a SBIG STT8300M with the integrated filter wheel and guider.
I have mainly been using the Atik for LRGB and am saving the SBIG for when I am a bit more cnfident and to have a crack it narrowband.
I love the Atik. Like any piece of gear it has a couple of things that could be done better but it is very low noise and quite sensitive. I have used a UV/IR block filter for my L frames and found the bloat to be easy to control. I have tested the SBIG and compared to the Atik, it is much noisier. Obviously dark frames will control that but I have been able to get acceptable (to me anyway) images without any darks using the Atik.
All the above is stated with the caveat that I am a novice imager!!
Cheers
Malcolm