If you are going to attempt anything more than moderate overclocks, I'd use aftermarket cooling.
1. Air Cooling - The top air coolers do a very good job, most "desktop" OC's today are no longer limited by heat but the voltage and other limits of the CPU. I oft find myself with max OC's where the system gets unstable and temps are in the hi 50's low 60's
2. Mini Kit Water Cooling - The better air coolers will do significanty better than the "faux" water coolers like the H50. Here we see the Megahalems topping the H50 by 5Chttp://benchmarkreviews.com/index.php?option=com_content&task=view&id=371&Itemid=62&limit=1&limitstart=11
3. Water Cooling - Unlike years back, today I see it basically a marginal gain for a significant increase in time and cost. Not that it's not fun
As for the HAF 932 .... yesterday's case ..... the HAF-X and DF-85 offer significant improvements over the HAF-932