I think about this kind of thing all the time as well. When I use my LV bags I'm super content. I think I don't want anything else and I'll put myself on a LV schedule of purchase eg., one bag a year. But then I go into
Coach and they have so many adorable new products. And next thing you know I'm picking one, two, three items. Ack! How many bags and accessories do I really need? Far less than what I own. I'm happy carrying Coach, too. I finally stopped carrying my new burgandy Mercer. I went to the Coach boutique today and it was so cheerful with all the KH items and pretty spring colours.
I would love to have a small collection but not sure I can do it. I think I'm tied emotionally to some of my bags so cannot give them up eg. Coach Sophia's which I don't carry quite as often but I love having them to use when the opportunity arises. So my next strategy would be to limit spending and acquiring. Very, very difficult with the amazing things coming out from Coach and LV.