I am the happy owner of an Bi-amped FMJA22 and CD23T based system. But I want to have suround sound when seeing films on DVD. I am not interested in SACD,DVD-A or 7.1 channels. Simple 5.1 Dolby and DTS is what I want. So for just this one need, how difference is there in terms of Sound quality between buying A DAVE module to my A22 and buying an AVR300?