PWM PC Fan Controller: Your favourite solution?

For my first PC fan CR box build, I used the following combo:

• A 12V DC power supply
• An adapter cable from that to a 4-pin fan connector
• A Noctua NA-FC1 for PWM control.

I use the Arctic P14 PST, so they can be daisy-chained. Therefore a fan splitter isn't necessary.

This works fine, the only disadvantage is that the NA-FC1 costs €20. Other fan PWM controllers can be bought for €5 or less (but cannot be hooked up in the same way).

What does everyone here use for PWM fan control?