NZXT Kraken X42 w/ i7-4790K

I wanted to buy a 240mm radiator, but my case will only fit a 120mm radiator or a 155mm tall tower cooler. Will the Kraken X42 perform well with an overclocked 4790K?

I'm currently using a Cryorig H7.

Do you think it would be worth the investment? I'm not looking to blow money just to have something that looks cool. I want to get 4.7GHz without maxing temps on a stress test.

*Nvm. Just realized X42 is 140mm. My case (Corsair Spec-01) only fits 120mm radiators. :(