70c idle, think its time to toss my "cooler" what is the best thing to get for a i7 7700k?

i currently use a evo 212 with 1 fan

was thinking maybe getting something like this https://www.newegg.ca/nzxt-liquid-cooling-system/p/N82E16835146064?Description=nzt%20water&cm_re=nzt_water-_-35-146-064-_-Product

but i don't know how it works or if this is even good