A few contributors above have suggested get a good streamer/front end before the DAC. This is the best advice. The enemy of every DAC is jitter and even if a DAC has zero jitter it can't compensate for the jitter coming in. So spend on your front end like you're going to keep it for 10 years and get a $1000 or so DAC.
An Aurender ACS10 will shock you when coupled with a cheap DAC and a N10/N20 will completely blow you away.
An expensive DAC just like expensive speakers will reveal shortcomings from down the line.