Actually I think hers are crossed for the five hundred dollar mark :-)
I bought mine used on the Buy/Sell forum. Bought my Amp the same way. Buying used shows the wife that you're sincere in your efforts to gain quality and not blow the bank.
"Honey, see, look at all the money I didn't spend which I would have spent if I bought new."
(Where's that whistling emoticon?)

...and before I decide on the purchase I read something that scares me away or convinces me to spend more.
I started a couple of threads on the subject and came up with, there's no easy formula for buying a DAC. I also came up with, DAC buying for the beginner, is more like dart throwing, in the dark. You point your budget in the direction of the dartboard, throw the money and enjoy.
Why do I write the above? Because at this price level, pretty much anything you buy, is going make you happy. Currently, the best thing happening, my opinion, for entry level, is going be the Audio-gd "Fun." From there, it becomes how deep your pockets are and how high you want to jump. I went with a used Burson HA-160 headphone amp and a used April Music, Stello DA100 Signature. I would have gone with Audio-gd (ROC + NFB-1) but their main payment method is PayPal and I don't do PayPal.
When I was agonizing over this question, regarding the thousand dollar price point, three DAC's kept coming to the front, the Stello DA100 Signature, the WYRED 4 Sound Dac-1 and the Audio-gd, NFB-1. I bought used and I'm glad I did. By buying used, I purchased quality products, all the while saving a boatload of cash. But, on the drawback side of buying used, you're, at any one time and point, limited to what's currently available on any Buy/Sell forum you might be frequenting. I feel I got lucky as to available choices.
In regard to questions such as the way I understand your question, there's only so much one can do and not drive themselves crazy. At the thousand dollar price point, I doubt there's anything listed above you wouldn't be happy with. No one unit being recommended over another. Under that price point, my opinion, you're going more than likely question your decision; buyer's remorse. As one person pointed out, once the price is paid, nobody's ever felt bad about buying quality and for me, I found the thousand dollar price point to be that line of demarcation; quality vs buyer's remorse. I found buying used, made the purchases that much sweeter.
Hope the above starts to help give you the insight you're wanting.
Edited by beeman458 - 10/2/10 at 3:13am