This is me currently:
http://www.wowarmory.com/character-sheet.xml?r=Emerald+Dream&n=Arthang
I love my Lavanthor's Talisman. 74 Shield block rating and an extra 440 block value for 20 seconds every two minutes is really nice. I have been putting off getting the 40-emblem trinket (84 dodge rating) because I like Lavanthor's talisman so much.
As you can see, with my current equipment I am not block capped (about 97.2% with Holy Shield up if I did the math right), so is now a good time to switch out Lavanthor's for the Valor Medal of the First War, or should I keep what I have until some of my other equipment improves a bit?
Repelling Charge dropped off of Thaddeus in my last Naxx-10, which would have been a nice upgrade to the Seal of the Pantheon, but unfortunately I didn't win the roll on that one.
I know that at a certain point it is better to replace block rating with dodge, but am I at that point yet?