Before I jump the gun & make a purchase, does anyone know of any potential driver or product updates to the HD650?
I ask because headphones are ancillary to my loudspeakers; therefore, I don't mind waiting.
I am aware of the HD700.
Also, is ~$350 a fair price for a new pair of these Sennheisers'?
I don't expect that the HD650 will get any updates for the rest of its production life, but I could be wrong. As long as you have the silver-screen version, you've got the latest one. Buying new will get you the silver-screen. $350 is a very good price to buy new, especially if it is from an authorized retailer. You probably won't find cheaper at the moment.