>As you know there is a huge difference in price between these versions. What are the advantages of Enterprise Developer?
>
>TIA,
>
>Alex


Check this page that compare the features of each version:
http://msdn.microsoft.com/vstudio/prodinfo/purchase/features.asp

Regarding prices, you may be eligible for an upgrade price. Check this :
http://msdn.microsoft.com/vstudio/prodinfo/purchase/pricing.asp

You may also take a look at the MSDN subscriptions that are now aligned with the VS.Net versions:
http://msdn.microsoft.com/subscriptions/prodinfo/levels.asp
http://msdn.microsoft.com/subscriptions/prodinfo/pricing.asp