Starting a BIFL collection

This started as an ask on what I should buy during the current sale, but keeping in mind a quote from Messeur Chouinard about not over-buying, I’d like to add to a collection that will last a lifetime. My winter set up is a down sweater hoodie paired with a granite crest. They are newish and are used alternating with a 30-yo TNF nuptse puffer. There is no reason why they won’t also last the next 30 years.

Looking at a nano puff, better sweater, synchilla, and R1 air hoodie. They would be worn to the office, gym, grocery store, and dog park.

What would you buy next?