IIS7 & Windows Server 2008
 

So I have been running a windows 2003 server with IIS6 for some time now. No problems works great. My host Server Intellect have offered me a new upgraded server with basically double everything that I have now for a awesome price. I will be switching soon and now have to choose the new OS. What benefits would I have going with Windows Server 2008 and IIS7 vs IIS6 & Windows Server 2003? Any help would be greatly appreciated thanks!