Edit: added images for reference!
2nd Edit: More specific question since one guy seems to just shoot people down, but provides no suggestions beyond it. Thank you so far to folks that are trying to help!

Hi folks,
I'm currently using an ASUS P8P67 Pro Motherboard and I have 2x R9 290x's on the board.
I have this in an Antec 900.
The 290x's are the reference card + cooler, and I've been eyeing these guys as upgrades for cooling:
http://www.arctic.ac/us_en/accelero-xtreme-iv.html
Will there be room in my case to upgrade both cards?
I've read that this particular cooler will take up 3 slots; right now, the reference cooler takes up two... I *think* there's room but I was hoping to find someone with experience

MORE SPECIFIC:
Since it doesn't seem like the Accelero Xtreme IV is a viable choice, I'll make the question more generic:
I'd like to come up with a solution to have adequate third party cooling added to the GPUs that will fit in the case, provide sufficient clearing for the cards, and not sound like a jet engine on full speed. (For all the complaints folks have about the reference coolers, they actually do a half decent job keeping the card cool @ 100% fan speed!... it's just *really* loud)
Anyhow, I'm open to swapping out the reference coolers with whatever will fit: air or water cooled.
Thanks for looking!