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.
14 NeverSummer Proto HD . 13 Never Summer Cobra . 12 Gnu Rider's Choice C2PTX
14 Now Drive . 13 Now IPO
13 NB x 686 580