Which part to upgrade next?

[Destroyed]

been slowly upgrading my computer over the last couple years and I need some help on what to replace next.

450 watt psu
i5-2400 3.1 ghZ *
8 gb RAM *
geForce 9800 GT 512mb
500 gb harddrive

* most recent upgrades..

was thinking my graphics card, however the psu may be a bit to low when i want to get a 2nd monitor here soon

edit: mostly upgrading to run higher settings on games while maintaining a live stream, also my MOBO is an asus brand, idk the exact model though =/

---------- Post added 2012-11-27 at 04:25 AM ----------

any help ?

[chaud]

Your GPU is the next weakest link. You should have bought a CPU that can be overclocked if you wanted to stream. What brand/model is that PSU?

[Destroyed]

its a rocketfish, sorry for lack of info but im not that familiar with this kind of stuff.. just the basics

[Deleted]

psu + gpu or just a GPU but don't expect any super performance (still huge difference with current card but low power draw cards aren't good for maxing out settings)
also budget?

[Faithh]

Just get a GPU like the 7850/7870.

I hope you don't have a diablotek PSU, they're doing their job really good screwing your PC.

[Destroyed]

i'd like to keep my budget between 100-300 for each piece

[chaud]

This PSU and this GPU should do the trick.