The only other niggle is the dac uses just a +15v single rail on the output stage supplies so its a case of finding something suitable with low noise and distortion on such a limited supply, of course an external supply could be added as an option but it then adds more cost
The dacs a voltage out type so something simple can be tried out without any I/V. Something similar to the Pass D1 maybe a laugh , could try both small bipolar or jfets