I have the T8+ preamp with the Insight phono board. I also have the Insight phono board in my Vision DAC/Preamp. The Insight phono board is excellent. Frank knows phono, that is for sure. (The phono in my Omega 50 is good, and that unit is 25 years old.) In a new unit, the board is a bargain @ 199.00. As an after-sale installation, the cost is a little higher, but a bargain, IMO. Frank prefers the Insight phono board, which he includes as an option in the AvaStar preamp. I am not certain about the AvaStar preamp, but Frank was able to install multiple phono boards in other preamps if an owner desired. I don't know if the phono sounds better in a separate chassis, but I think that Frank would have told us if a phono section in a separate chassis were a better option.