Intel is going to ship an updated cooler with their upcoming Haswell-E processors. The new cooler's product name is tagged under SKU code TS13A, and can manage up to 140W of heat (which would be the TDP of the 6 and 8-core beasts).
The new model is a bit taller at 75mm versus the 63mm of the RTS2011AC. The TS13A will start shipping at the end of the month, it will be boced with Haswell-E processors (launching mid-September).
Intel Haswell-E to get improved stock boxed cooler