After a fab snowboarding week in Bansko, I am looking to buy an all mountain snowboard in the sales, maybe a Rome Solution but I am getting conflicting information on the right size from different shops, can anyone help. I am 175cm tall slim and weigh 77 kilo at the most, I am told to either get 156 or 158 but which one is best? it won't be used in the park just cruising about.