Front Stick to a single optical drive and find a way to mount the HDD cage behind the rad - should be easy with a little modding, no cutting will be required. Install a single row of 120x25mm fans in either a push or pull fashion to give you that extra space behind for your HDD cage. Get the PA120.3 instead of a dual rad and stick to cooling just your CPU/GPU... NB doesn't really need to be water-cooled and will unnecessarily dump additional heat into your single loop (besides straining the pump).