I have a 919THX which I love. I purchased it in 1994 or 1995 I believe. It has THX but I now would like to upgrade to 5.1, 6.1 or 7.1. I see that other receivers with these features run about $700 and up. Can anyone help me resolve whether I should buy an outboard processor and try to connec tit via my PIN Port or if the price will wind up being just as much as buying a new receiver in the end. All help would be appreciated. Thanks.