I've owned several EVGA SC, and they are reference boards, so any cooler that fits a reference 980Ti will fit yours. That is why the Zotac AMP! cooler will fit it, they were both reference designs.
EVGA's custom PCBs start with the Classified and FTW editions (Or Kingpin, for the insane). Zotac's customs are the Extremes.
Arctic also makes Accelero Hybrids. The newer models come with a large heatsink that isn't half bad. I had an old one some years back on some GTX580, they came with loose heatsinks and a pretty terrible plastic shroud with a fan.
The NZXT G10 brackets can actually look decent-ish in the right circumstances. (This particular one would look better with a backplate of some sort)
http://pcpartpicker.com/b/ndBPxr
Really depends on if you are planning to have the card in a tower or desktop orientation.
If you don't like ghetto all-in-one, then water cooling the fun way is your best option.
If you want lighting effects. XSPC Razor waterblocks, which I have three of, are nice. They have a block of acrylic that shines through with provided white LEDs. You can swap those from some RGB LEDS and you would be all set, particularly with the RGB plug fitted on a lot of the Z270 boards.
Custom water cooling all comes down to how much you want to spend. I consider myself in the moderate price bracket. Nothing too extreme, but still hopeless over-priced.