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.
[edit] Correction - just an extremely badly designed site. The upgrade etc buttons on the front page do nothing, the tabs have to be used to see the upgrade prices which still look very steep for the new content.