You gear looks really solid, except your weapon.
If you want to keep using a 2hander definitely get one with Lifesteal, LoH sucks with 2handers due to the low attackspeed.
But since your budget is to low to get a good Skorn with LS, look for Warmongers they are dirt cheap and have natural LS. http://eu.battle.net/d3/en/item/warmonger
This should give you a great survivability boost but you might loose some dps
I dont see anything else that would be a decent upgrade for less than 6 mil.
If you get more gold you should try getting the Innas 2 Piece Bonus.
There are 2 ways I would reommend, the defensiv one with Blackthornes chest+Inna Helm+Inna Pants and maybe the Blackthornes Amulet for extra Vit.
The other one is more offensive with Andariels or Mempo(if you are rich)+Innas Chest+Innas Pants, Andariels is great for poison monks but the Problem with this Build is you are forced to get really good Innas pieces with high vit or Resist and those are really expensive.