What part should i Upgrade

[TheGrovesyProject101]

hey guys i'm looking to upgrade my pc in the coming Christmas and was eager to find out what people think i should upgrade my current pc specs are:
CPU: I7 4770k
Graphics Card: Nvidia GTX 780(reference card)
PSU: 750watts(dont know the make as its generic i think)
RAM: Corsair Vengence 32gb

These are the things im thinking of upgrading to:
I might upgrade my case and PSU to a corsair rm 750 watt and also a corsair 900d as my current case is old and built around the last system so i have a button hanging out of the case to turn it on as the internal wire didnt reach(i couldn't be bothered to buy an extender for the front IO so the USB on front doesn't work either)

Upgrading the graphics card to either 2 way sli 780's or a single 980

upgrading monitor to either an ROG swift or a acer xb280hk

so what should i choose and why?

im hoping this lasts me a while as its not often i get money as im only 15 and preparing for GCSE's so i cant really get a job atm

 

[zeyuanfu]

You might want to upgrade the PSU as generic generally isn't very good. EVGA SuperNOVA units are very good and have very good value/price. The RM750 isn't very good as it has bad caps and is made by a bad OEM. Your GPU is fine, but if you have the extra 500-600$, you can get another one. I do NOT think you need a 900D, a 750D would be fine. this would be the upgrade I'd suggest:
PCPartPicker part list / Price breakdown by merchant

Case: Corsair 750D ATX Full Tower Case ($119.99 @ Micro Center)
Power Supply: EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ NCIX US)
Total: $209.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-07 16:48 EDT-0400

 

[TheGrovesyProject101]

thanks man ill probelly end up doing that as much as i want the 900d i guess i don't need it.

 

[zeyuanfu]

No problem!