I've owned both a GNSC modded 830 as well as the 840c. There's no doubt that the 840c is an excellent CP player for the money with an excellent set of features (digital in, digital out). But... my GNSC modded 830 was exceptional. I sold it because I wanted a transport with digital out and my 830 didn't have that. Before you take the plunge, you may want to give Steve Huntley at Great Northern Sound a call. He's an excellent resource and will give you an honest opinion of the 830. Since the stable transport it uses is no longer available, that may be a consideration... Steve can answer that question.
I'm currently using an Oracle CD transport which I love but... I think I'll always miss that GNSC modded 830.
I'm currently using an Oracle CD transport which I love but... I think I'll always miss that GNSC modded 830.