I have an AVP and have wondered the same thing myself. There is a review at www.audioreview.com under Proceed AVP that is really a review of the Proceed AVP2. The person that wrote it had an AVP upgraded to an AVP2 and was very pleased with the results. It is a $2500 upgrade and some dealers may not be comfortable doing the work so you may have to send it back to Madrigal.
Proceed AVP and AVP2 upgrade
Currently own an Acurus ACT III processor, but use a Resolution Audio CD55 run balanced direct into power amp for music listening. I've had the Proceed AVP in my system for a few days on a trail run. It's a good buy, and sounds great in DD. The AVP2 upgrade path is open - which would be a good investment if it will give me better music performance. Anyone out there who can comment on the AVP2's musicality? Does the Levinson Mk40 "trickle down" technology make a substantial difference? (My transport/DVD player is a Sony DVDP-7000, and speakers are Thiel 2.3)