Hlgoh2006,
Welcome to AudiogoN! One of the great benefits of this site is that you can buy a used product for a good price, try it in your own system for a while and re-sell it if you don't love it. I've done this often and typically it only cost me shipping cost or a few dollars in price errosion. It is a great way of trying different equipment without spending a fortune.
I don't have any recent experience with Quad amps, so I can't answer your original question. However, I have lots of experience with buying/trying/re-selling on AudiogoN and I have a lot of experience with budget tube amps. Maybe you could tell us a little about your speakers (design, efficiency, etc) and someone can suggest some tube amps that you may want to try.
Enjoy,
TIC