Depends on how much you want to spend as well,... the Xigmatek S1283 or OCZ Vendetta 2 are very very close in performance (within 1-2 degrees) to the Thermalright TRUE with a fan actually included, less than half the price generally for each of those,... ~$30 compared to ~$60 plus a fan
If you want to use the side fan, then a 92 mm hsf combo would be something to think about, the artic freezer 7 pro or the xigmatek SD-964 would be considerations,.. they won't perform quite as well since they are similar tower designs, just somewhat smaller and smaller fan. Though the side fan will help overall system cooling,... really not needed in most situations though unless you are doing multi graphics cards, raid arrays and such all at the same time, even then,...