If professional is the only one that offers DirectX 11, I'm of course going with that.
Anyone have any objections?
What, no. The only one that wouldn't let you use DX11 probably is Starter but even then probably not.
DX11 is a vital asset to PC gaming. It can't be restricted to one version of Windows. All versions of Windows 7 will be able to use DX11, lol.
I use Win 7 Ultimate. But its all preferance IMO.
Same here, its all preference really. I just get mine for free.