I'm new to this board, so hello to all. Anyway, I highly doubt that anyone, including PKI, will build another tallest and fastest coaster for some time. The return on investment has to justify spending that kind of money. Like someone stated before, TTD cost something like $25 mill and to go higher and faster would be considerably more expensive. In my opinion, TTD is an awesome coaster and even though it doesn't have a lift hill in the traditional sense, it does deserve the title of tallest and fastest. Face it folks, this is a new generation of coasters we are seeing these days and new designs and technologies are allowing for more different and intense rides. Many would argue that Face/Off and Wicked Twister are not truly roller coasters because there's no lift hill in the traditional sense. We should all be glad that companies like B&M and Intamin are pushing the envelope with these new extreme rides. Otherwise, you're limiting yourself as to what these coasters can do. Just think, if no one had come up with the reverse inclined launch, LIM launched, standing, floorless, flying, would there be as many coasters out there as there are now? I wouldn't think so. And, remember this, someone could say the same about steel coasters. They do have the lift hill, but someone had to have the foresight to come up with bending steel and totally changing the way that coasters were thought to be made. Without innovations, there would not be nearly as many coasters today if everyone just stuck to the basic wood coaster, no inversions, no launches, no reverse incline or LIM launches. There would be no Flight of Fear, No Face/Off, No Son of Beast, No King Kobra, No Vortex. The list goes on. All you would have is The Beast and The Racers. How boring would that be?