First time upgrading prebuilt Asus

[Lunchboxxz]

Finally upgrading my 5~ year old prebuilt asus. I have had some trouble finding the exact model number, but I'm 90% sure it's the essentio cm-6850-07. I've only begun to experience issues running games within the last year or so but I definitely need an upgrade to play Street Fighter V, which comes out in about a month. I know very little about PC hardware so any help or advice is appreciated!

Specs:
Intel Core i7-2600 @ 3.40 ghz, 4 core
8 GB ram
nvidia geforce gt 530
320-350 W power supply (numbers i've found online differ, but i'm pretty certain I'll need to upgrade anyways so it shouldn't matter)

If it makes much difference the main games I play are fighting and RTS along with a few shooters.

I was looking at the Strix gtx-960 as it has some good reviews and seems to be a decent value. My main issue was figuring out exactly whether a GPU was compatible with my motherboard or would fit in my case properly. My budget is somewhere around $300.

Thanks!

EDIT: The issue of 'bottlenecking' has been brought to my attention. Would this be a concern with my setup?

 

[Goat Fantasie]

gtx 960 is massive overkill. aim lower.

 

[Lunchboxxz]

gtx 960 is massive overkill. aim lower.

How is it overkill? Seems like spending $200~ on something I can rely on for several years would be worth it.

 

[Mousemonkey]

I'm running dual 970's with my I7 2600k and it handles them just fine.

 

[Lunchboxxz]

I'm running dual 970's with my I7 2600k and it handles them just fine.

good to know, thanks.

 

[Goat Fantasie]

gtx 960 is massive overkill. aim lower.

How is it overkill? Seems like spending $200~ on something I can rely on for several years would be worth it.

It wont last for several years. If you keep it for ages it will depreciate to nothing.

If you aim mid range then you loose less in depreciation.

Sensible option is to spend $100 & upgrade a bit more often.

 

[pete_101]

gtx 960 is massive overkill. aim lower.

How is it overkill? Seems like spending $200~ on something I can rely on for several years would be worth it.

It wont last for several years. If you keep it for ages it will depreciate to nothing.

If you aim mid range then you loose less in depreciation.

Sensible option is to spend $100 & upgrade a bit more often.

That's a strange argument you've got there. So it's better to buy a lower performing card that you'll probably be disappointed in as you won't loss so much when you upgrade to the next disappointing card?
Look if you spend $200 now, you get a good card that you're happy with. Sure it will depreciate until it's almost worthless, so what? If you get a good few years out of it, then you can happily say it was worth it. A better card now will last a lot longer before needing replacing, so I don't see how the mid/low end card that needs upgrading more often is any advantage.