Quick question regarding setup

I just got my EK 5870 waterblock and started brainstorming on whether or not I might need to use my second 120.2 rad to cool both the GPU and CPU.

I'm currently using a GTX 360 cooling my W3520. Can I just add my 5870 to my existing loop or should I rearrange my setup to accommodate my GTX 360 + 120.2 rads.

Thanks for the help.

I think just the 360 might be fairly borderline so I'd add the 120*2 so you won't have to worry about it !