Get rid of the NA's, keep the TT. Buy another car. I sold my 2+2 for a TT. I have a daughter. All the back seat was ever used for was to collect junk. And if you are that concerned about hauling lots of friends and future kids around, then buy another car. I bought another car with a back seat recently and I hate it. Id rather drive my Z everyday. The power the Z creates is something that is hard to replace or re-create. And I even know that. lol :) Good luck!