No comprende' Thiel, so this is just a side bar comment. An upgrade to something that represents most all of its used value would not be a good thing to me. An upgrade of 4grand to something in the 14,18 grand level;well, maybe. Also of GREAT importance would be ;is everything you already have as good as it needs to be now,? and for the upgraded speakers? How much could you get for your 7's? How much would you have to pay for a pair of 7.2's? Important things to know,for you.