I am looking at upgrading my sony receiver to either of these models, but have a few questions. Both will be refurbished units and pcmall.com is seems to have the best price. They advertise they are an authorized Harman Kardon dealer, has anyone bought from them. The prices are 179 for the 125 and 229 for the 225. My next question is the 225 worth the extra $50? I read through the basic differences such as extra inputs, on screen display, and extra output, but am not sure if they are worth it. Last, these are the older units correct because the 130 and 230 are the new models from what I read. How old are they and is it something that in a year will be out dated?