Thanks for the link. Euro prices are much worse, a flat 225 euros for everyone. (I suspect that the site scripting is broken as it also shows the same pricing in USD and GBP - a real rip-off!)
At that price I will definitely be giving it a miss, and start looking at competitive products. I'm afraid that WS10 doesn't bring enough to the party to justify the prices of no better than a half-point release.