So it really isn't the raw potential, more of the confidence and feel you get while driving it you are after. I can sort of understand that, but there is a line that gets drawn when you are talking 10 second street cars that will "feel" like a 2xxx lb 200hp fwd car. 10 second cards have 3xx wide tires and are generally designed to be "uber" stable at high speeds. This imparts loads of confidence at high speeds, but in normal driving, the limit is so high, you have to drive like an insane person to have the same fun.
Maybe you should look at things mentioned above like swapped RX7/8's and others like it. It will be light, pointy, and fun, but will still have to be driven with extreme caution if capable of running 10's all day.