Arthur, the first suggestion relating to that tax "refund" would be to take steps to assure that this year you won't be giving the Federal government an interest-free loan and won't be getting a refund next year.
As to how to use your overpayment, since you have over a thousand classical CDs, it seems unlikely that going into an obsolescent audio format would be a sensible move. Also, since your 3480 has plenty of power, buying even more wouldn't appear to be cost-effective.
What would make a real improvement in your enjoyment of those classical CDs would be to listen to the surround ambience mixed into the front channels in surround speakers. One of the fine HT receivers, such as those from Denon or Onkyo, can apply DPLII to extract the ambience and send it to surrounds, such as QS8s, where it belongs. This is how I listen to the thousand or so classical CDs that I have and I'd never voluntarily limit myself again to listening on only front speakers.
