Summary: Sun, I bought AV-1 for over 4 years from Tom Lee Music Co. I have considered for sometime before I bought this system as 6K is quite expensive at that time. But now the price should drop to less than $2,000. Peter is right that AV-1 has no Dobly Digital or DTS. Only 4.1 channel (Centre, front left, front right, Rear speakers) is provided for Dobly Prologic. Rear left and right used the same channel.