Help me pick some upgrades for my gaming pc $1500 budget.

[Sugar Fervor]

I would like to upgrade my GAMING PC this week - my budget is around $1500.00 could you please help me out with picking some new upgrades that would be good for me.

I would like a new GPU but let me know what else you think would I would benefit from for performance increase. Keep in mind I am also a live streamer and run 2 monitors for gaming.
below is my current specs.

Specs:
*i7 - 4770k @3.5GHz
*16 Gb DDR3 Corsair Vengence @ 1600MHz
*z87 Asus Sabertooth motherboard
*MSI Geforce GTX 780 3GB Video card
*Kingston V300 240GB sata 3 SSD
*Seagate 3TB Serial ATA HD
*Corsair TX850w powersupply

 

[gskill support]

1500$ you can built a top of the line system. Your system is already pretty good, just need a GPU upgrade and that should be a gaming machine.