Hey just looking for some advice. I got the late 2015 iMac 5k i7 4.0ghz processor. I didnt upgrade the ram through apple because its so much cheaper in other stores. Im looking to upgrade to 32gb. But, now I see 64gb is an option through OWC. Did anybody else put 64gb in your imac 5k? Is it worth it over the 32gb when editing 4k footage and what not? Rendering time? Whats your advice?