This phrase made me chuckle, and also because I'm not sure for whom the process was more terrifying - the culled watches, or the owner having the difficult job of whittling down the collection.
I think you called it right, except I'd personally have kept the Speedmaster over the Zenith. Oh, and I'd also be greedily holding onto that Grand Seiko.
Excellent trio of watches - it must be quite mentally liberating in some ways to streamline like that (if it lasts...).