I've heard the Stello DA200, on which the DA100 Sig is based, and really liked it. I doubt there's be anything to "blow it away" sub $1,000.
That being said, $1,500 is a bit of a dead zone for coax based DACs. The value curve seems to peak just below (up to $1,000), and the next step up comes nearer to $2,000.
Anyways, here's some ideas for auditions/research:
Bel Canto DAC1.5 - voiced similar to Stello
Anedio D2 - Sabre based; more contemporary sounding
M2Tech Young - as the Anedio
NAD M51 - outside your budget, but have seen people compare it to the Berkeley Alpha, suggesting it would be a step up from the $1,500 bracket offerings
That being said, $1,500 is a bit of a dead zone for coax based DACs. The value curve seems to peak just below (up to $1,000), and the next step up comes nearer to $2,000.
Anyways, here's some ideas for auditions/research:
Bel Canto DAC1.5 - voiced similar to Stello
Anedio D2 - Sabre based; more contemporary sounding
M2Tech Young - as the Anedio
NAD M51 - outside your budget, but have seen people compare it to the Berkeley Alpha, suggesting it would be a step up from the $1,500 bracket offerings