Mojave (10.14.4) and Logic 10.4.4 on my main machine, various Mac OS on all my slaves except Win10 Pro on one PC. And the only stuff I run in VEP is Kontakt and Play libraries...What's your DAW and OS? If it's not Reaper and is Windows, I'd say definitely jump straight to 7. I think a lot of Mac users are happy, but from what I can tell there's more problems at the moment on Mac still. I think the VSL folks are still working on Reaper issues.