Hey Darren , tough decision Ive been through it each time Ive upgraded
From what Ive gathered your a proficient and experienced observer so any gain in aperture is going to be easily noticed . I wish i had kept a log of my thoughts when i went from 8" to 10" but its hard with the differing FLs of the scopes to, but overall my impressions where more of a subtle nature then a sudden wow feeling .I think the common take on going from 6" to 8" is appreciable but from 6" to 10" would be outstanding , the higher resolution with your skill level opens many more doors to your observing regime if the bigger scope fits your lifestyle though.