Their performance is more than decent.Artic P Series would still be my go to choice - they still offer a decent amount of performance, whilst being relatively quiet, and at a fraction of the cost of other brands (e.g. Noctua)
P12's A-RGB version spec sheet includes now P-Q curve and that's definitely toward the better end:
https://www.arctic.de/media/cb/67/c0/1638880679/Spec_Sheet_P12_PWM_PST_A-RGB_0dB_EN_white.pdf
Curve being on top right side of imaginary line from points curve crossing x and y axis tells blade geometry performs well in most conditions from high impedance to lowish impedance.
(that dip at almost zero back pressure is meaningless for real world use)