ive got spare 3-4 grand to spend towards a home theatre. my mates got the sony HTDDW7600and that sounds really good. im thinking of getting diamond 10 series speakers along with Yamaha RXV 1067 reciever. im stuck wheather if i should just get the sony package and save one cash as suppose to the yamaha/wharfdale. is there a great deal of difference in price vs peformance comparison? what would you recommend?