I want to buy a amplifier. But I am not able to understand which amplifier to buy and which not to buy. One of my friend told me that onkyo a-9555 is the best amplifier. I have searched the features of it on internet and found that it is really a good amplifier. But I want the opinion of that person who is using this amplifier. So, is there anyone who can give me onkyo a-9555 review?