Nevertheless, your initial plan of getting T10 after offset hasn't changed much :P
My first 3 purchases were all T10. Went gloves-->shoulders-->chest. Then got the badge cloak cause it's sexy. Used my upgrade token on the chest. When I made these purchases I was thinking very long term as how they'd fare at the 25man heroic versions. I knew I was getting shafted initially by not going after Kraken gloves and Cata chest. I highly doubt Blizzard will buff the T10 to match the armor values of the offset without taking out a lot of stuff on the current setups. Or find a medium at least. If I were you, I wouldn't worry too much over it. I think the ilvl264 T10 (figuring in set bonuses) is supposed to match offset in overall value, and ilvl277 T10 would be superior. This was clearly not the case. You have badge gear that is on par with the equivalent T10 gear. By the time you have access to the ilvl277 all of ICC is open and badges will be coming in at a faster rate.
Everything is FABULOUS with warrior tanks again.