A BEnchmark DAC is widely regarded as fairly reference quality in regards to jitter and in fact would make a good "benchmark" for that.
There are also reclocking devices out there designed to minimize jitter that that can be inserted between source and DAC, which might also be a good reference test. Audioengr, who posts frequently here, makes such a device for modest cost.
There are also reclocking devices out there designed to minimize jitter that that can be inserted between source and DAC, which might also be a good reference test. Audioengr, who posts frequently here, makes such a device for modest cost.