A fan fits the cooler, not the processor.
A cooler fits the motherboard,not the processor.
The coolermaster coolers come with fans which are adequate. No need to replace them.
Your E6300 is a lga 775 based processor, so look for a cooler with a lga 775 mount. Most coolers will have such a mounting kit.
Among your choices, I like the hyper 212 or the V8 because they have 120mm fans which cool better and are quieter.
Get the least expensive one.
The Tx3 uses a 92mm fan, as does the 752. Not so good for quietness or cooling power.
Any oem cooler will be an improvement to the stock cooler for overclocking.
I like the large tower type coolers with slow turning 120mm fans. There are several available for <$40.