go big or go home buddy! you bought a pretty pricey cpu but seemed to skimp on the cooler? plus most cases should have an exhaust port near the back of the case near the cpu heat sink for that purpose.
there are several options u can take.
1. new case, and keep the fan/heat sink
2. get yourself something like the v8 and point it up? any fan that will point up i guess would work for you
3. water cool + a case that will allow for it