Sorry, but I am lost. Purchased my Audya 4 a couple months ago. Do I need or would I benefit from upgrades or whatever all the excitement is about? Of course then I would need to know how to get these improvements, do they cost, if they are downloads or memory stick how step by step do I install without messing up what came in the machine. Anyone want to bring a newbie up to speed on what, how, when.....

Thanks, Gary