I do not work for VSL but I wanted to add my two cents here. VI Pro is WELL worth the money. I honestly don't see any reason for not getting it now. I initially downloaded the demo, to be sure but after using it and watching all the videos on VI PRO on the website, it was set it stone for me.
- Polyphonic legato didn't seem like a big deal to me at first... try loading your strings in the regular vienna instruments and play lush legato and you'll realize how big a deal it really is. (There are lot's of little things like this that really aren't little, but once I did it with VI pro, I can't go back to not having them.)
- Humanize and auto voicing are just brilliant
- My "3rd reason" as I usually explain this to everyone I know. GET THE NEW! When new bug fixes are added and new features, if you stick with the old program you aren't going to see those changes. If you plan on using any of your tools long-term, whether VSL or not, it only makes sense to upgrade when the bigger changes like VI Pro come out. If you don't, when VI PRO 2 (or whatever) comes out you will be two steps behind. Your learning curve will be steaper and as we all know too well, time is money.
I am a Cubase fanatic. I love VST expression but VI Pro is a bigger deal to me personally.
This was my mentality, hopefully it may help you or anyone else. VI Pro has saved me loads of time. I could never go back.
-Sean