I came across 50 million gold and would like to upgrade my Barbs gear, no idea where to start though :S
Here is a link: http://us.battle.net/d3/en/profile/timmy360-1149/hero/25087444
Any help is appreciated!

EDIT: Forgot to mention I am running a WW spec.

On my phone so can't really see too much, but one thin I noticed is you have a mempo, when you could be getting an IK helm with more damage from crit and the awesome four set bonus. Try to get one with all resistance, I would say.. You'll want at least 500 all resistance for higher MPs.

@eleganthobo is certainly right about the IK helm.

I found my WW barb way more fun once I was doing a TON of damage. If it were me, I'd probably swap the pants with a nice pair of Inna's Temperance, either with VIT or all Resist, STR not as important.

I would craft some bracers and shoulders with whatever you have leftover from your AH purchases.

I would also consider getting more life steal. Not sure how squishy your barb is right now, but getting 8+ life steal without any skills really made me invincible as long as I could WW. Your EHP is right there with mine, so I'd imagine it'd be roughly the same. High life steal on gear gives you the option to get even MORE damage with the Brawler passive.

The cheapest upgrade with a noticeable difference will be your offhand. Get something with all the stats you want, I'd recommend a butchers sickle. You're looking for Life Steal, STR, Crit DMG and a socket. Easily affordable under 5m or so, VIT if you get lucky. DPS is less relevant unless you use Rend or Bash or whatever your main attack is more than you use Sprint to kill.