I won't say I am the best tank, but people generally compliment me on my abilities and I have tanked everything except Halls of Reflection Heroic (it says my gear is too low). My current gearscore is around 4300 if I recall correctly.
Basically, I would like it if someone pointed me in the direction of where to go in terms of gear pre-ICC. I have been grinding heroics like mad, getting my Emblems for Tier 9 gear and my 2 daily Frost Emblems. Are there any guides yet for aspiring, 10-man ICC tankadins?
Crafting wise there are also Saronite Swordbreakers (http://www.wowhead.com/item=47570). The nice part about the white knight / Saronite Swordbreakers in terms of craftables is that they will last you into at least the early stage of ICC, or in the case of my guildies at least, they have. From there on out it's been random heroics for hours on end to finish up every last bit of gear I could get my hands on.