Bump, any insights guys?
Don't know if you're still looking for input or if you've got everything figured out - didn't see this thread until this morning. I've had the R4 for a while now with a build pretty much identical to what you're describing, minus the water cooling (I use a NH-D14). I've got Noctuas all around and GTX770 SLI. I just switched my build to an Arc Midi R2 because I needed the R4 for another project, but if you still have questions on it or on fan configuration let me know. I think I've tried just about every configuration and control setup possible.