There's a couple of Silverstone NT series coolers that'll fit. Other than that it's the Zalman flower style coolers (don't know if these are compatible? Poster on this page said theirs didn't fit) and then there's watercooling with a front mounted 120.2 rad.
I'm using a regular Scythe Ninja but I'm still using a full ATX case.
I'm using a regular Scythe Ninja but I'm still using a full ATX case.