I found a local deal on Craigslist I couldn't refuse, found a set of 16" Sparco Terra wheels off another Ford Fiesta with almost new Kuhmo Ecsta 4X all-season tires in 195/50/16. They were originally listed for $550 but I was able to get them talked down to $400. The wheels are in great shape and I feel the 16" will look better than the original 17's. IMO these are the perfect size, and I probably shaved 5-6 lbs per corner. The ride is substantially better with the 50 profile tire and the slightly bigger diameter fills the wheel well nicely. These are 16x7 with a +42 offset so they sit 5mm further out than the factory wheels.
Sparco 16" vs Factory 17"
Sparco 16" vs Factory 17"