Yeah, kinda agree with Iyona. BUT. Think about it. Are you first on line about getting a head token (nefarian) or shoulder token (chogall) ? If you are, go for the gloves, because yeah, T10 4p is good.
On the other hand, if you are not 1st on the line, you should think about investing in the Tanking ring first. In the end there are also tanking rings on Chimaeron and Conclave, so do as you want, but gloves seems to be the best option. Just try to insist on getting the last T10 piece, after all you're a tank, so you deserve everything that is purplez above others (basically).