My advice (worth what you are paying for it) it to treat Audiogon like your personal auditioning service. Buy, listen, and sell if you don't like it. You will lose a few buckes each time (maybe), but you will be better off in the long run. Listening to the rest of us lather on about gear we own doesn't really help you in the long run...we all come with our own preconceptions...for example, I owned a Musical Fidelity headphone amp...couldn't wait to get rid of it, so I never reccommend their products to anyone...others obviously will disagree.
It's more work and will take longer, but you will be better off in the end.
There's another thing. Above I said go listen to a nonos dac. I love my dac (it's obviously a nonos), but just because it works in my dac, doesn't mean it will work in a Ack! dac or a Nixon or an Audio Note or a whatever. Listen,listen,listen
Steve