I would avoid any cooler that is not venting air outside the case. That includes the Asus and Gecube.
I prefer HIS (especially if they come out with an IceQ3 Turbo Version.. great cooler) and Sapphire.
My case has four 120's, two blowing filtered air in, two on exhaust duty, so I think it should be able to keep up. I just think the GeCube looks cooler and quieter, but I guess we'll see.
I still haven't seen any pics from HIS or Visiontek, kinda weird.