How much runway is needed for comfortable operations in a PC-9?
TBM quotes the distances for the 700 at 


  Take-off: 2,133 ft (650 m) 
  
  Landing: 2133 ft (650 m)


And Pilatus for the PC-9 


  Take-off distance over 50 ft obstacle at sea level: 1,300 ft (397 m)
  
  Landing distance over 50 ft obstacle at sea level: 2,255 ft (687 m)


The PC-9 and TBM 700 are very different beasts (did you mean PC-12?)

comfort is about you the pilot and there are some pilots who operate right down to book minimums. Like anything else in aviation the pilot is the ultimate decider and you can operate both of these planes off a 2256 foot strip in clear weather. I'm not sure I would. I would think 3000ft. is enough to comfortably fly either of these planes. The FBO I rent from at KDYL flys King Air 200's out of there all the time and they only have 3000 ft there. For planes like this, considering their common missions I would also look for a strip with a solid IFR approach, sells Jet-A on the field, enough ramp room to fit your plane, and taxiways wide enough for your wing span as well as sufficient runway length. Its also going to take a lot more than "familiarity" with single engine prop planes to move up to a turbo prop.