Handling the dynamic range of objects like M8 can be tricky....I've yet to acquire an A+ M8 image, so please don't think I was picking on you. As I've said elsewhere, I'm simply not your Mum saying "that's nice dear" then put the crayon sketch on the fridge
Rob Gendler I think got the colour pretty right with this one:
http://www.robgendlerastropics.com/S...ustrioNML.html
But I think it's important to realise there is nothing set in concrete here, whatever floats your boat often works.