>>272516358
I've got the 64gb and my reason for buying it was simple, I ordered it on the night of OC6 when they announced the link and as I was going to be using it as a dual-purpose device I saw no need to get the more expensive model. 
And I was right, Link works fine, i've got all the Quest-native apps I want on the thing already and i've got like 28gb free. 

I personally feel like 64gb would be enough even if I wasn't going to use Link. 128gb is a luxury upgrade in my view.