This is a really difficult question as each headset has their pros and cons. There's no real good allrounder which includes pcvr. No matter which headset you buy, there will be something which lets it down.
If you don't want things to get silly expensive, and you are adamant that the vast majority of stuff will be pcvr, I'd lean towards the pico 3.
It has a displayport connection and a lower res screen which means your 3080 will be able to manage to hit a constant framerate whilst allowing some eye candy, and some AA to smooth out the flickering/jaggies. I really liked the pico 3. It has a lot going for it.
The pico 4 is as much an upgrade as it is a downgrade. It's wireless only so you drop 10% performance straight away as everything needs to be encoded, plus it adds a little latency. You need to ensure you have a router close by, and pay £15 for virtual desktop. The battery life for pcvr is a bit crap, so you'll need to be plugged into a power socket which defeats it being wireless. The resolution is much, much higher so you will also certainly need a 4000 something, and even then don't expect to be hitting the high/ultra settings. The upside is that the optics are better (not perfect, just better) so it is a clearer image with a slightly bigger fov.
Comfort is subjective, and whilst the pico 4 is physically a lot smaller and lighter, I found the pico 3 to be more comfortable.
That being said, if you wanted to get into VR to play beat saber, star wars, mini golf and do a little pcvr and didn't mind the trade offs with image quality I'd say pick up a second hand quest 2.
Just as a reference to give you some idea. I've had lots of headsets over the years, and the three were talking about, the quest2 and pico4 hammered my 3080Ti something rotten. The pico 3 was a dream, but when I changed to a pico 4, I had to upgrade to a 4090. Now that is much better, but in iracing with the image quality how I like it, it's gpu load is 80%-90%. I drop down some AA where it settles to around 50%-60% and I'm 90% happy with the picture. That's iracing though, which I love.....some other racing games aren't quite as bad.
Don't be put off though, VR is awesome. I've switched completely over now, and have sold my monitors from my simrig. There's just nothing like racing inside VR.
