if you have money problems you buy quest 2
if you want pcvr you add the link cable
if you want less head pain you add a better strap
you will be happy with a decent headset that was very cheap

if you don't have money problems and want good pcvr you buy index
you will be happy with the best headset and overall best experience vr has right now

if you want wireless pcvr and for some reason the quest2 wireless pcvr which works just fine isn't good enough for you, you buy vive pro (1) with the wireless attachment and some cooling attachments because that thing overheats, also a mic attachment because vive mic is shit, also probably a whole headphone attachment honestly because audio sucks too
this is going to be expensive as fuck and won't feel worth it 90% of the time unless you're hardcore into vr dancing and even then it's questionable if it's worth it

if you have way too much money and don't know what to spend it on, you buy base stations 2.0s and knuckles controllers and [reverb g2] or [vive pro 2 + headset for audio because the audio on that thing is still dogshit] and and rtx 3090, and then realize you just paid 3x the amount for an experience that is approximately 5% better than having just bought an index. it will play well but you'll ask yourself why didn't you just buy an index

if you buy anything else in 2021 either you got it for a really low price that negates the quest2's advantage, and honestly you should've just bought a quest2 anyway, or you're just plain stupid and never heard the term market research

have a nice day