Why do you say many prefer the Rega 8 over the 10? Everything I read claims the 10 is another step up in improvements. Are you meaning the 8 has a better value/price ratio?
That's what I've read in many threads. It seems some people don't like the platter of the 10. I don't have personal experience of them, though my first decent TT was a Planar 3, and I still have a couple of Rega tonearms as secondary arms on my SME tables.