i dunno which one that match to your need but all that you need to consider is:
1. the size of heatsink, most extreme hsf has big size that related to the weight. does it fit to your case?
2. material, most of hsf has heatpipes, from 3 to 6 or more, many heatpipes could bring more heat to fins so the processor would be cooler, the size of heatpipe and how it packed, like direct touch, how flat the base
3. what about the fan?, some hsf include fan on it, some hasnt, so you need to buy it byyourself
4. how hot your processor and the ambient temp, it will affect the hsf performance
5. support, i mean how flexible the hsf, like amd or intel based, could it matched with bigger fan or double fans
6. the price, skip this part if you have money tree
7. brand and benchmark, since out there many brand and type and so its kinda difficult to find except you search by yourself
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what about this
Noctua NH-D14
Xigmatek Aegir SD128264
Silver Arrow from Thermalright