I've had a shock from AIOs though. I'm reading lots of issues with the Lian Li Gallahad pump, and my DeepCool LT720 pump was faulty out the box. I wonder if the company that makes the pumps has an issue or there's been a bad batch.
I'm tempted to either risk 'cheap' again and get the artic 360 AIO, or go stupid money and go for NZXT 360 or the EKWB Nukleus, bot at around £200. The Kraken on my 8700k has never let me down.
Some AIO are their own pumps
Others just rebadged asetek
So it's hard to keep track of which are which
And I think I remember an issue with artic ones too
Though from my admittedly bad memory
Artic dealt with it in exemplary fashion
Similar with ek
They have more experience than most with watercooling stuff
On the custom watercooling side
And done some AIO
but people have had issues with their stuff too
All things with a pump
They have more points of failure
Than an air cooler does
So if it fits inside pc case and clears ram etc
And it's not the absolute highest cpu
Sometimes something like peerless assassin, spirit etc
May be a better choice than an AIO