155 vs…

Hi I am 5.7 and 165 lb… I am an improver to intermediate rider…I have been renting the gears so far ( and never pay attention to the size of the board :p) and realized that it is time for me to get my own gear I saw a 08 Burton Elite board here in Dicks on clearance and they are available in 155 and 158.. I am an all moutain snowboarder