Honestly, my advice would be STAY with Rift. Rifts ..what am I looking for...interface?, with AH, is way smoother than Steam or Windows Mixed Reality. Unless you have an issue with needing Facebook for Rift Accounts? As I understand it, the RIFTS is almost as clear, but the "sweet spot" is wider than G2. Just my $.02
You clearly have not tried a G2. The difference between the G2 and Rift S is enormous. The Quest 2 is roughly halfway in between. The base model Quest 2 is a steal, but you will quickly find yourself buying a better headstrap and while it is possible to link it to a PC via wireless, in theory the link cable is still superior, so that's another hidden cost.
I started with the Rift CV1. It was very immersive, but it was like playing at 640x480. So I only used it about half the time, preferably just for flying around because spotting/identification in air combat was very difficult.
The Rift S was a nice step forward. I could actually read some panel gauges without leaning forward or zooming in. Air combat was much better. I used it about 80% of the time.
The G2 image quality is so nice, that I now fly 100% VR. I can read all but the smallest of labels/indications in aircraft cockpits. The DCS F-14 has a crazy complicated cockpit with lots of small labels and simulated wear and tear. The G2 lets me see all of it nearly as well as a flat panel monitor. 4k flat panels still look better with both higher resolution, higher frame rates, and higher quality settings, but the margin of superiority has fallen dramatically compared to the Rift S.
Enter the Quest 2 with a link cable: Very could clarity and a big step up from the Rift S. I can fly VR 100% of the time with this headset, too. But when you contrast it with the G2, it is very apparent that the G2 is better by about the same margin the Rift S was better than the CV1, enough to make a very noticeable difference.
The WMR/SteamVR interface is the G2's main disadvantage. But WMR has some features I actually like and use that Oculus doesn't have. The G2 does have a much smaller sweet spot. The crystal clear image only occurs near the center of the field of view while the perimeter is of much lower, more blurry quality. But the G2 doesn't make you sell your soul to facebook just to play a game, so it has that going for it.
If I could only have one, the G2 is my preferred PC headset by far. My main complaint with the Quest 2 is battery life. I can play all day with the Rift S and G2, not so with the Quest 2. The Rift S is so obsolete that I only used it because my G2 was out for replacement and I kept having to stop flying because I was killing the Quest 2's battery. The CV1 is collecting dust. I would give it away to someone, but no one I know would use it and its quality is so far behind, I wouldn't want someone suffering with that low resolution when the Quest 2 is so affordable.
