Looking for suggestions for parts that should be upgraded and what would be ideal

[Dremin]

Here is a list of most of my current PC parts:
http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=19281326

I have upgraded my RAM to a total of 16 gigs.
I'm currently using a dual monitor setup with my main monitor being the Asus vg248qe 144hz and the other is just an old LG 60hz monitor.

I just got a Gigabyte Geforce GTX 970 graphics card for Christmas and figured now would be a good time to consider upgrading other parts of my gaming rig. I want to upgrade my processor from the i5 2500 Sandy Bridge to something like the Intel Core i7-4790K 4.0GHz Quad-Core Processor. I know this means I'll need to upgrade my motherboard too and was wondering if there were any good suggestions for motherboards.

I also was considering just getting the Intel Core i7-3770K 3.5GHz Quad-Core Processor since it wouldn't require upgrading my motherboard but I wanted to see what the pros and cons would be to getting this instead of the Intel Core i7-4790K 4.0GHz Quad-Core Processor.

 

[DonkeyOatie]

Why do you want to upgrade? The 2500K is plenty for the GTX970. What software other than games are you running? What is running so badly that you think you need to upgrade?