Greetings!
There are a couple different options here...you can either go for an AIO solution or a custom loop. An All-In-One setup is easy and generally less expensive, but a custom loop will generally look more interesting. Either will cool your system just fine, though with certain custom setups running multiple large radiators you can see a difference in temp due to the increased cooling capability of all those radiator fins...Two 480mm rads will generally allow for more heat dispersal than a single 120mm or 240mm AIO.
CPU AIO's are abundant and as varied in design and appearance as other pc components, so you can really choose which looks best, fits your case/mobo best, etc. Here is a link to Newegg with the CPU AIOs listed by number of reviews so you can see which ones are most used and discussed within the pc community, and here is a link from pcpartpicker with compatible AIOs:
https://pcpartpicker.com/products/cpu-cooler/#W=10120,10140,10240,10280,10360&sort=a6&page=1
It looks like your case can only support 3 individual 120mm (1 front, 1 back, and 1 side). I could not tell, but there may be limitation in you case in regards to putting a radiator in the front due to the location of the HDD cage, and the side panel fan location may interfere with your GPU...so you may be limited to only one 120mm radiator capability which would not be ample to cool both your CPU and GPU under load. You may need to look into a different case that will better support a water cooled setup.
There are also add-on AIO setups for your GPU that are kits to work in combination with some of the AIO's that are designed for CPU cooling. Here is one option: http://www.corsair.com/en-us/hydro-series-hg10-n970-gpu-liquid-cooling-bracket, or you could get a GPU that is already set up with such a critter:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814487173&nm_mc=KNC-GoogleAdwords-PC&cm_mmc=KNC-GoogleAdwords-PC-_-pla-_-Video+Card+-+Nvidia-_-N82E16814487173&gclid=Cj0KEQjwwMi7BRDGptbvwOCDj8oBEiQAIALyDOHq8qxW25NDuHOAxurU4eVgzvgN3DYbxGjEoUtTGj4aApTu8P8HAQ&gclsrc=aw.ds But seeing as you already own a decent GPU, the kit above or a custom loop may be your route...Though again, I do not think your case supports these options to a serviceable degree.
So, now for custom loops...This is a big area of discussion and I will not attempt to cover it here for there are a myriad of options for both CPU and GPU. The fact is, is that it is a 'custom' system, meaning it is highly subjective to the needs and desired appearance of the individual user. Other factors like socket/mobo compatibility, power draw support for pumps and fans (depending on size and complexity of the system), hard or soft tubing, fluid type/color, and budget all factor in as well (you can easily blow $800+ on a custom loop).
Here are a few sites to explore for custom options:
http://www.frozencpu.com/cat/l1/g30/Liquid_Cooling.html?id=KtsTsmFo
http://www.performance-pcs.com/water-cooling
https://www.ekwb.com/
Another good resource for liquid cooling info is youtube:
https://www.youtube.com/results?search_query=water+cooled+pc for if you have never done a custom setup, it can be a bit daunting, particularly if you go with hard tubing which needs to be bent to tight specifications (though I will admit, looks really awesome in comparison to other options). Here also is a link to forum lists here on the topic: http://www.tomshardware.com/s/water+cooling/forum/.
I know I didn't recommend anything here and only provided info, but I am unsure of your budget, and what kind of appearance goals you are looking to meet. Again, I would recommend looking into cases that would better support your desire for cooling, for I really don't think your case is going to allow what you need to cool both CPU and GPU. You could easily cool the CPU from the rear 120mm, but I think that is all you can achieve with your case. Here is a good option for a case that will support a wide variety of water cooling setups: http://www.newegg.com/Product/Product.aspx?Item=N82E16811854003&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-VigLink2-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3821802&SID=ipzmn2hx63000a1700053, though there are a lot of options out there as well.
I hope this helps in some way
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