Aftermarket rims and resale
I recently bought a CX-5. I changed from the stock 19s with garbage tires to light weight 17s with premium all weather tires. (Super happy with that decision, although TPMS sensors made it far too expensive.)
I was planning on selling the current tires and rims ($900?) but I'm worried I'll lose money down the road if I go to trade in. I have no immediate plans to upgrade, but the future is always uncertain.
One alternative would be keeping the 19s in storage, putting them back on the car at time of sale, and selling the 17s on craigslist.
Another alternative would be mounting nice summer tires to the 19s. That might make sense, although I'm not sure I need summer tires given my driving habits and if I did I'd prefer to get wider, lighter 18s.