Sintered base is a must on a pow board. Only time I would say it doesn't matter is for a beginner that won't notice the difference and on park boards that are going to get destroyed anyways.
15 NS Ripsaw . 14 NS Proto HD . 13 Gnu Space Case EC2PTX . 2013 Salomon Powder Snake
14 Now Drive . 13 Now IPO
14 Flow Hylite