My main goal was finding more options (and if truth be known cheaper options) for the 17″ wheels. No other real goal. I was finding very few OEM size options and those that I did find were more expensive than tires for 19″ wheels (that I bought recently and plan to use anyway). There are lots of options for OEM size tires for 19″ OEM wheels in a wide range of prices and capabilities (but not 17″ ones — which seems strange as I am thinking there are lots of those wheels out there).
I was planning on leaving the 17s in the garage as backup so I might just pass on new tires — the ones mounted are useable (but getting a little old).