Over in Hot Deals, someone mentioned that Newegg has a refurbished Shuttle SS51G for $219. I was all set to buy, but then I noticed that there are new models, specifically the SB51G, SK41G, and SS40G. I'm assuming these are newer models, but from the descriptions they look to be the same as the SS51G. Shuttle's site is down, so I can't check it out there. Does anyone know what (if anything) is different about these models? I am looking to build a media/PVR machine, so would the SS51G still be a good choice given these other models? Thanks.