I love when questions are this easy.
The H320 is an entire world away from the two others in terms of cooling performance, noise and expandability....not to mention that every component of the H320 is vastly superior to the other two choices - significantly better pump, cooling block and rad.
As far as the GPU, with the H320, since it is open loop and expandable, you can simply add a GPU block, no need to add another cooler. We are talking a real GPU block, made to cool your particular GPU, not a one-size-fits none solution with no VRM cooling. You wind up with an actual loop rather than a CLC plus another CLC that is totally ill-fitted and rather looks like someone threw a dead octopus in your case.
H320 - better performance, significantly quieter, expandable, easily add real GPU block for custom loop, easily modified for looks
H110i/X61 - downgraded performance, significantly louder, no expandability, no VRM cooling for GPU, downgraded GPU performance, looks like dead octopus or plate of squid ink spaghetti when you add the second for GPU
Really a no-brainer.