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.
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite