If he is a good friend of yours, he probably knows that HT is a hobby of yours. In that case he will ask you what you think. Then, if he's open to criticism (only you know that), I would tell him the truth without bashing what he already has. I would tell him that his is a decent system but unfortunately way overpriced by marketing for what it is and that if he is willing to spend that kind of money, that he would be better off with something else. I would then put together an Axiom system in the same price range of what he paid for Bose (probably between 2K/3K) and have him come over to listen to your system to give him an idea of what you are talking about.
Good luck.
