I haven't heard the new NFB-10WM or NFB-10ES, but they are also within your price range, $780 or $850. After shipping and paypal fee should be about under $1000. Wm8741 is supposed to sound a little smoother and warmer, and I would recommend it over the es9018 dac chip version if you are uncertain what kind of sound you are looking for, or you know you don't like recording flaws revealed.
Kingwa has said dac19+c2 are better than NFB-10 models with single-ended headphones, but NFB-10 models are better with balanced headphones. My experiments are limited, but imo, single-ended can give a full pleasant sound. Balanced can give more accurate detail and wider soundstage sound but may sound too serious or true to recording. I can easily imagine how dac19+c2 may sound better than NFB-10 when comparing only SE, so if you for some reason only want to use SE, or you like the sound of SE, forget about NFB-10 models.
Another option is to get the NFB-2/3, which have the wm8741 and should be a little more forgiving than the pcm1704 dac19.
Also there's audio-gd's Digital Interface if you want to reclock your computer's usb or spdif before sending it to the dac. I think it would be a worthwhile investment, but may tip you over your $1000 budget. I haven't tried the DI, but have tried the older reclocker model ref 3, and it makes the sound less fatiguing, more accurate and coherent overall. Note when purchasing from audio-gd there'll be a 3% paypal fee and also a pretty big shipping cost to Australia, $72+.