Thanks for that. I tend to create models only. Model file formats tend to be stable and I have modeled in 8.5p and opened them up in version 11. Same going backwards - except that I really liked the stitch tool in version 11.
I'm interested in "hair" - if I can play with hair a lot faster than in version 11 then I'll upgrade - I liked the hair by patch approach but it also meant 4 hair handles for every single patch of hair. In some characters thats great, only a few handles but on others it was a nightmare.
All in all thanks, I enjoyed looking at the upgrades available - I think I will upgrade and get the plug-ins like the 3D painter module. I'll start saving my pennies as the echange rate looks really good £ vs $...
Thanks for the input guys.