Well, I've gone and done it.
Sold my Rift CV1 on ebay for £270 and ordered a Rift S.
Not bad considdering I've had it 18 months and used it 3 or 4 times a week, every week, in that time, and I paid £350 for it!
Was sold on the improved optics of the Rift S. I'm just a little concerned at the number of people complaining about Black Screens/Cable Enumeration and slow tracking/Release of Grab issues.
My take is that people generally only voice an opinion when it is negative and all the positive experiences go "under the radar".
I wil post an update once I'm all setup and hopefully it will be a positive experience. fingers crossed