The best for your needs then. Or wait, no overclocking? Why are you even upgrading the cooler then? Stock coolers are good enough to let you play games while managing the temperatures quietly since they are designed for stock clocks. In my opinion, don't upgrade the cooler as Define R4 is a very quiet case with fantastic airflow, with that, you wont even need any sort of cooler at all since it would keep things extra quiet and cool.
In answer to your question luckiest charm. I'm upgrading because the stock cooler I have is reaching a point where it is well worn and it has become particularly loud and the cooling is not brilliant either
There is really no such thing as a cooler"wearing out". The fans could go bad, or the heatsink could need cleaning. There could also be an issue with the thermal paste, But, most likely, if the cpu has not had issues before, the heat sink just needs a good cleaning. Spending a few bucks on a can of air. and removing the heatsink fan(usually 4 screws) to blow it out properly, is better than spending an extra ~ 30 dollars(US) on a new cooler, in my opinion anyways. OP, can, you please give us some info into why you think your stock cooler is "worn out"?
Well I too had some issues with my cooler 2 years ago on old Pentium D.
It was producing shrill loud noise, one would give anyone a headache. It was certain that its the cooler since removing it killed the noises (Although PC won't boot) and replacing it was the ideal choice at that time since using a portable vacuum cleaner to blow the dust did no good. It was related to fans malfunctioning or rubbing with something I was not able to figure out. Although rare, but machinery tends to go bad sometimes.
I have an old Intel Pentium Dual-Core E5200 at 2.5GHz, and I'm thinking to over-clock it to 4GHz using a 3rd party cooler. I've tried over-clocking on stock cooler up to a stable 3.55GHz. What is a suitable cooler for E5200? I don't need expensive technologies for the 2009 processor.
When I buy the new CPU cooler, what can I do with the Intel stock cooler? Throw it away?