Fealane, I would suggest replacing your dps pieces with tank pieces as much as possible. Try for the 333 and 346 rep items first, and then look into crafted items. If there is no easy to acquire option for a slot, I suggest looking into a dps piece with mastery. That way you can reforge the dps stat to dodge or parry. If you do not want to replace any gear, I would suggest that you do not reforge for hit or expertise. IMO you'll be better of reforging for more dodge / parry / mastery instead.


Found this right after I wrote my reply. Don't forget to read the comments to get some idea of what 4.0.6 will do for you.
http://wow.joystiq.com/2011/01/25/lichborne-death-knight-tank-pre-raid-gear-guide/