Looks very nice! Really like your bracers, haven't seen many better than those. Ofcourse your helmet is sweet aswell, expensive piece of gear. Personally I like to have more disc but that's my opinion, You could get that disc on your DML, with just a little loss in dex.
Overall a well balanced character, if anything could be improved I think yuor left ring and weapon are the first two pieces to replace.
In the link my DH, this is my main setup, I change it now and then for farming/variety. While farming I use a hellfire ring and leoric's signet. What should be upgraded next?