I just installed a new WIN 2008 R2 64 server at my office. My be the last one before jumping to the cloud (or selling the biz for a boatload of money and retiring). I didn't want to go through the hassle of all that crap so we virtualized my old 2003 SBS on the new hardware. This spring when I find the time to migrate to 2013, I will install that directly on the Win 2008. But in the meantime, everything is on the new box running just like the old days. A very easy migration and I would highly recommend it for your client!