Hi there!
I have a pegasos II G4 and am looking at the hardware compability list (https://morphos-team.net/hardware) trying to figure out what gpu to get. If possible, I would like to try to get the "best" supported gpu. I've tried to search online, but find it quite hard to understand if I can use any of those listed graphic cards on all the supported motherboards or if I need to exclude some of them because of me using a pegasos (and not a powermac 5 for example).
Thankful for any help regarding this!

> If possible, I would like to try to get the "best" supported gpu.

The best tested thing is to source a 3.3V-compatible AGP 1.0 Radeon 9800 (Pro/XL/XXL/XT).
If you are adventurous and want a (probably) unique config, you could try to source a PCI Radeon HD5450 and have that working even in 3D with the latest public TinyGL beta, at the expenses of lower bus speed and not being able to access the SmartFirmware though.

Indeed, the CGA-5452PLI also has HDMI.