Advice on 1000$+ upgrade

[BSlayer]

Well I finished my first build and now I have the feeling...

to add more!

However, I'm not sure what to upgrade/add next. I could spend up to 200$, more if I'm replacing something.

i5 2500k @ 3.8GHz

Gigabyte GTX 560 ti OC

Gigabyte Z68MA-D2H-B3

Coolermaster Hyper 212+

Ripjaws 8GB (2x4 GB)

Thermaltake TR2 600w

I mostly use the computer for gaming, but I do a little editing and audio producing on the side as hobbies.

TIA

 

[g-unit1111]

If your PSU's capable of it, adding a second 560TI wouldn't be a bad idea, otherwise I can't really think of anything.