Air carrier captain refused the aircraft because the ground spoilers were inoperative and the flight was to arrive at JAC; a high elevation airport with a short runway.

Narrative

When reviewing the flight plan; I noticed the previous crew had submitted a maintenance entry on the spoilers. Upon arriving to the aircraft; maintenance personal were onboard and advised me they were going to tag out the left and right number 1 spoilers and apply an MEL. This MEL increases landing distance by 10 percent and requires a minimum runway landing distance available of 5;500'. Based on the planned landing weight and the forecast weather at JAC and using the landing distance chart on FD Pro; I calculated a landing distance of 5;865. While this calculation is less than the runway available at JAC; it is greater than the minimum landing distance available required by the MEL and leaves a very small margin for error at an airport with a short runway and a high density altitude. After discussing with the first officer and dispatcher; I determined the safer course of action was to reject this aircraft and request one that was better suited for the unique challenges of operating at JAC.