120x3 sorry I look wrong at your image.
I would say raise the Top Rad or new one and add 3 more fans for a Push/Pull setup.
Your Rear Fan will pull out the heat as it does now. Push/Pull may be the Key to what you now have.
Being only One Loop that is Pump - Rad - CPU - Pump.
PS Still a Nice Looking Rig, maybe you will think about creating a
MODS RIGS Page for it.
The Count is DOWN!!!! 1,000 EVGA Bucks System Countdown: 5 so only 5 More Rigs need be created.