I, too, have an AVP and have been extremely happy with it. I'm running the AMP5 with it (balanced on available channels) and Aerial Acoustics 7b's up front. It excels in both two channel and HT aplications.
As for upgrades, I spoke with a guy in Madrigal's service department to get the low down. He said in about 10 to 12 months they will release the AVP 2 that will be a SIGNIFICANT software AND hardware upgrade (original AVP owners will be able to upgrade existing units, but I'm sure the cost will be commensurate to the upgrade). Hope this is helpful.
As for upgrades, I spoke with a guy in Madrigal's service department to get the low down. He said in about 10 to 12 months they will release the AVP 2 that will be a SIGNIFICANT software AND hardware upgrade (original AVP owners will be able to upgrade existing units, but I'm sure the cost will be commensurate to the upgrade). Hope this is helpful.