Couple of things, because this question inevitably pops up (Paul, you've had this question come up enough times, you should have this in your original post :) ).
Crossgrade prices, 240 Euros for the VI Dimension Brass and 35 Euros for the crossgrade to get the Synchron edition, in case anyone is looking for what the pricing is on the crossgrade. You have to buy the VI version first to get the discount on the Synchron edition (special note on this in the next paragraph). There is no upgrade path if you buy the Synchron edition first and try to get the VI edition afterwards (although, Im sure the sales staff at Vienna will work something out with you if you do it in reverse).
The special note, if you add the VI and Synchronized edition to your basket and buy at the same time, it will apply the discount (you can add them in any order, just note that the Synchron edition wont show the 35 Euro price on the product description page if you add it first, but it WILL show as 35 Euros on the checkout page when you go to pay, provided you have also added the VI edition).
Historic Winds work the same, 195 Euros for the VI, 25 Euros for the crossgrade.
Also, what the hell is a "crumhorn"?