that had no relation to the question whatsoever....
im 5'7 170, i ride a capita stairmaster extreme 152 and i can take it full speed anywhere, i was more comfortable bombing with my 154 which was also considerably stiffer, but the 152 is much more maneuverable yet still possible to bomb, ideally though i would use the 154 for the best combo of speed and maneuverable. the 152 is my park/main board now.