360 AIO or push/pull 240

[gt1551]

Hey guys im currently putting together parts for a custom build and i have been trying to perfect it for a little while and one of my last issues is the cooler.

 

my pc will be using an i7-7700k overclocked up as high as i can get it.

im not going with the full tube and reservoir set up and just want to use an AIO. 

 

My pc case is gona be the corsair crystal 570X (yes i know people will be recommending the meshify C, but please dont bother, ive made my mind up on the issue).

 

the case supports a 360 radiator in the front. Due to my graphics card clearance, i can either put a 240mm AIO with a push pull configuration, or a 360mm on standard configuration.

 

will one give me much higher overclocking headroom than the other?

the AIOs i was debating between are NZXTs kraken series or corsairs AIO coolers.

 

thanks for all help in advance

[MkaiL]

Does it have to be corsair or nzxt? Because then it's really simple, they both don't have 360mm aio's. Would a 280 (has almost the same cooling capacity as a 360mm) fit in push/pull with your gpu? Seems like that would give you the best temps.