As owner of the G2, Rift S, Rift, Odyessy +…and casual VR developer, I definitley recommend Oculus Rift S for development over all. The lower pixel density means you don’t have to have a top of line computer to create great visuals (even though I use a 3090 system). Oculus software presently is the best to work with and the controllers are the easiest to program for…they just work without effort.
The G2 is as everyone says…the top HMD out there. The controllers are similar to Oculus but cheaper and without touch…but are presently a pain to get working with SteamVR and other things. Once you do though they do the job.
Since everything VR is going OpenXR, there won’t be a need for individual HMD plugin drivers. OpenXR will be taking care of everything starting in UE4.27+. So whatever HMD you choose, OpenXR will be the go to driver for all.
Oh yes, the Oculus Quest 2 is definitely worth looking at, though the higher pixel count might be a slight factor if trying to push a lot of visual stuff in VR when attached to the PC. I haven’t used one yet but am considering getting the updated version come August 24 where I live.
Cheers!!!