I think you should keep it.
When i get the chance, mine is going in for a full strip (right down to the chassis) full paint removal (right down to the metal) any repair's rust or anything is going to be removed and if need be replaced, all the metal parts such as the subframe and wishbones etc are going to be sand blasted and repainted in high impact paint, the engine will go in for a full rebuild and have twin upgraded Turbos, stroker kit, high lift cams,etc basicly good for 600-700bhp, and then all put back together, it wont be a new car but it will be almost new.. just think when that is done it would cost the same as a new TT anyway .. but you dont loose the "relationship" with the car lol.
Perhaps im just blabbering