I have 2 offices. One runs SBS Essentials 2011 and the other runs WHS 2011. They are very similar except for the Active Directory.
I have been very pleased with WHS 2011 and actually have a copy at home and a spare copy (picked it up on sale for $30)
Very easy to reset a computer that has been corrupted. I have had to do this twice, once on each system. Same process, fast and easy.