I have both the Quest and Rift S (previously a Rift and DK2, along with regular usage of the Vive). I would say just get the Quest.
For PC-backed graphics and exclusives, you can use Virtual Desktop with the sideloaded unlock to do wireless streaming or use Link for a hardwired experience.
The Rift has better quality screens and optics, but the Quest has a higher FoV and I find that ultimately wins out for overall experience.
The hand tracking stuff is very cool, extremely well done, and a bunch of stuff is coming down the pipe for it right now. It's supposed to come to the Rift too, but for now Quest has the advantage there.
I will probably end up selling my Rift at some point. I got the value of playing Alyx at full quality, but don't consider the minor IQ loss with streaming to the Quest to be that much of a blocker. I can do everything with the Quest, so it's the system for me.