Your gear looks fine. I'd consider putting 3/3 in Crusade if you want to go to Naxx. There's an awful lot of undead in there and 6% extra damage is nothing to sneeze at.
I'd replace the Judgement glyph with the one for Righteous Defense, especially since you aren't hit capped.
Pick up the sense undead minor glyph, and run sense undead all the time.
Try to pick up the Black Heart out of ToC 5 man (heroic, I think) for the armor buff. It procs all the time.
Other than that, you look pretty good for Naxx.