I agree with Cleeds. What you have now is a used unit. A refurbished unit will have been bench tested before being shipped out to you to ensure it's in working condition, and cleaned up to look new. I would venture a guess that a refurb would be less likely to be problematic in the future than a new unit. This is one that's had a problem (as has yours) and been repaired (as yours would have been). Yours was once new, and failed. Go with the refurb.
Yamaha Amplifier Warranty Issues
My Yamaha A-S2100 integrated amplifier under warranty has been sent to an authorized Dealer for repairs, Yamaha says the parts are back ordered 10-12 weeks and some cannot be found yet. They refuse to replace with a new amp. What good is this warranty? Is'nt there anything I can do?