Shadorne, my experience is that I like the discrete resistor controls better than pots, because I sense greater clarity, definition and coherence. I only have one experience with a chip control (which I think sounds ok) but received some feedback on another forum;
http://db.audioasylum.com/mhtml/m.html?forum=amp&n=159528&highlight=help+understanding+mitch2&r=&search_url=%2Fcgi%2Fsearch.mpl%3Fsearchtext%3D%26b%3DAND%26topic%3D%26topics_only%3DN%26author%3Djnr%26date1%3D%26date2%3D%26slowmessage%3D%26sort%3Dscore%26sortOrder%3DDESC%26forum%3DALL
I found it interesting that while they thought the PGA2310 was an upgrade of the CS3310 from Cirrus Logic, they still found the chip controls as a group to be crappy, including the PGA2320 in the $10K Esoteric C03.
http://db.audioasylum.com/mhtml/m.html?forum=amp&n=159528&highlight=help+understanding+mitch2&r=&search_url=%2Fcgi%2Fsearch.mpl%3Fsearchtext%3D%26b%3DAND%26topic%3D%26topics_only%3DN%26author%3Djnr%26date1%3D%26date2%3D%26slowmessage%3D%26sort%3Dscore%26sortOrder%3DDESC%26forum%3DALL
I found it interesting that while they thought the PGA2310 was an upgrade of the CS3310 from Cirrus Logic, they still found the chip controls as a group to be crappy, including the PGA2320 in the $10K Esoteric C03.