Guys:
Thanks for the recommendations and advice. Good ole Shane brought by some tubes I purchased on Saturday and also loaned me the Antelope Zodiac+, again. My set-up with the Zodiac+ is:
Mac Mini > Zodiac+ > Moscode 402 AU > Usher Dancer Mini II's. Yes, very simple and a set-up I could not imagine 6 months ago - no preamp in the chain.
You are likely thinking, why not buy the Zodiac+? While I may do so I would end-up buying a linear power supply for it and I wish it had a standard USB connection rather than using the mini B. The Gold edition will address both of these concerns but unfortunately it will likely come with a steep upgrade in price.
So, where does this leave me? I will admit to trading e-mails with Steve of Empirical Audio and he recommended a tricked-out Overdrive DAC for approximately $5000.00. While I have never heard one I have no doubt it would sound very good but I will not spend that amount of money in a stand alone DAC regardless of how good it is. It is just a case of knowing the product will have little value 6 months down the road due to the rapidly evolving technology.
Honestly, I had this slight hope that you guys were aware of something "earth shattering" that I had not considered. I am looking for "silver purse performance" at a "sow's ear price."
Seriously, putting the Zodiac+ back in the system and removing the Bolder Analog Modded Squeezebox 3 reminded me of a recommendation Rich made to me approximately 6 months ago. "When you replace something in your system just sell the old piece of gear because it will never be good enough for you again."
I will take my time making a decision, take advantage of listening to Shane's DAC and eventually buy a DAC from him!
Thanks again for the responses!
Happy Holidays!
Ken