I have a Kraken X52 240mm AIO at the moment but it must be nearing 5 years of age soon, so thinking I might go back to basics and get a HSF instead. Getting worried the AIO will break/leak before I proactively replace it.
I have been out the game for a while but think the Noctua NH-U12S is a very popular mid-ranger (£60) and preforms well. However I think they have released a baby brother version for less and it seems to match/beat the U12S performance - the Noctua NH-U12S Redux (£45).