I know there may be shields that match it a little bit better but there are a number of reasons why I want the Bulwark of Azzinoth. Besides it being completely awesome, I've always looked up tank information at maintankadin.com and their logo (other than the tank with wings) on one of their shirts is a paladin in T6 with a bulwark and it looks awesome. Also, the Bulwark of Azzinoth isn't a dark black shield or even a dark grey. It actually has a little bit of a purple tint to it so it does match the T6 quite well even though it doesn't have any gold in it.
As for weapons, I think I might have to go with a burnished Quel'Serrar though I would prefer a mace. The maces you listed are nice looking but I think it should be more purple than blue since the T6 set has gold/silver/purple to it. I did use the Hammer of the Astral planes when I had my full T7.5 set though and that looked good. I may try to find my Merciless Gladiator's Gavel though cause that looks pretty freakin awesome too. I just may have gotten rid of it a long time ago....