The replacement kit may come in handy in a year or two, if the included foam pads get damaged, etc. Although I’ve also thought about wearing something similar to a Zorro mask to keep my face sweat and oils away from it. I read somewhere that someone had successfully washed their pads with their laundry, so maybe they’re more durable than I think.

As far as a power bank, I’m just thinking that I will want to play standing up quite a bit (exercise being one of my main justifications for getting this - hence the sweat I mentioned) and the battery seems to go down remarkably fast, so the PB should help until Valve releases the replaceable battery setup they’ve mentioned in the future.