If you look at any thread on boots, they all say go try them on. Only you can tell what size you need, which lacing system works the best, how stiff a boot you want for your riding style, etc. I have an aggressive style of riding, so I have a stiff set up when it comes to my gear. You might have the same or you may have more of a laid back, surfy vibe to it. Completey different boot. As for brands, a 8.5 in a pair of 32's might fit you perfectly, where an 8.5 in a Burton might give you heel lift. It all depends on style of riding, manufacturer, and personal comfort.
'12 Lib Tech T.rice / '12 Burton Cartels
'10 CustomX / '10 Co2 EST