I had the Imperial last year (and the Ion this year). I'm not a Burton fan, but they're just that comfy and solid, albeit somewhat pricey. Haven't had a chance to try Celsius boots yet, so I can't really comment other than regurgitating what I've read, which is that they're great too.
15 NS Ripsaw . 14 NS Proto HD . 14 NS Cobra . 13 Gnu Space Case EC2 . 2013 Salomon Pow Snake
14 Now Drive . 13 Now IPO
14 Flow Hylite