New intel build...will my current memory be good for OCing?

ok, so I have an Intel i5-2500k and I plan on pairing it with THIS mobo

I have 8GB of Gskill RAM. I dont know if this will be an issue, but they are 2 different models of Gskill RAM

This is what I have
2x2gb of this RAM

and

2x2GB of this RAM

Will this RAM be good for overclocking with? Should I match the RAM and replace 2 of the sticks with matching sticks, or is it safe to go with the mismatched sticks I have?

I wouldn't get two different ram's for a single PC...but maybe I'm just paranoid.

But besides that fact, I would think that you should be able to oc it with ease.

Its always best to use matching sticks, but I've used to different types of memory before with no problems so who knows unless you try.