Sell the 240 (ugh), then think about the little things. TT are great, the 90 Z is always worth more than any other model year because it is the first of it's kind/model/style/etc. So, you could keep the 90 for value (hehe), or go for power in the TT. In that case, sell the NA and buy the TT. Wish I could do that. Probably would want to buy one that's already got mods on it.