I have to echo Jon's comments above. I have BOTH systems. With 2 offices I have SBS Essentials 2011(SBSE) in one office and Windows Home Server 2011 (WHS) in the other.
Before you jump down my back for WHS 2011, it is based on SBS 2008 just like SBSE, the main difference being the active directory support.
They both work fine. I am not convinced at this time that active directory has made my life easier. It hasn't made it harder either. But it did cost $300 more.
The lack of technical expertise in many who who AC now may well drive them to a simpler solution. Peer to Peer is simple. I know there are theoretical advantages to Client Server but P2P is easier to set up and troubleshoot.
Just my 2 cents from a guy in both camps.
