The Le Toy III by TwentyFourBicycles is the most badass hardcore hardtail there is. It was released before dirtjumping became mainstream so it was sort of the first freeride hardtail or downhill hardtails on the market. The frame is very interesting, it has BMX style bottom bracket, gusetted rear triangle, massive downtube, can take V-brakes and disc brakes and can be run as singlespeed or with gear. It can also be set up with 24" or 26" wheels and could swallow the 3" Nokian Gazzaloddi tire without any problems. I prefer the III over the fourth version.