Hey sorry I can only answer one of these questions, but as far as wireless goes its great immersion while moving around since you can do so freely. But it's worth noting that you'll need some light source on otherwise you'll lose tracking. One time while trying my headset out on a webxr game, I lost tracking while burying my head into a pillow and it really through me out of the experience while getting it back up. You can also experience some lag if your wifi should drop at some point or another. This shouldn't be a problem if your pc and router are in the same room as you though.
My quest 2 gets roughly 2 hours of use on default battery, so if you plan on playing longer you might want to consider alternative straps with battery packs. You can get a elite strap but there are a few companies that have a lot of people recommend for less money. The default strap isn't bad but these other straps will also make it more comfortable.
One last point, the quest 2 has individual hand tracking you can use instead of controllers but these are kind of gimmics for now. Your vr hands feel slow to respond and you lose tracking a lot when your hands are down slightly. Hope this helps, sorry for my limited experience but I'm new to vr.
My quest 2 gets roughly 2 hours of use on default battery, so if you plan on playing longer you might want to consider alternative straps with battery packs. You can get a elite strap but there are a few companies that have a lot of people recommend for less money. The default strap isn't bad but these other straps will also make it more comfortable.
One last point, the quest 2 has individual hand tracking you can use instead of controllers but these are kind of gimmics for now. Your vr hands feel slow to respond and you lose tracking a lot when your hands are down slightly. Hope this helps, sorry for my limited experience but I'm new to vr.