I have a set of the Martian MW03 in 18x7.5 on order (hopefully will arrive next week), will fit them with 225/50-18 Nikian Hakkapeliitta R3 tires. These tires have a diameter which is 1.5% larger than the stock tires. I would have preferred to get 215/50-18 tires (same diameter as stock), but none were available nationwide. The larger sidewall is better for potholes, though, so maybe not a bad tradeoff.
If this weren't a leased car, I'd probably have gotten two sets of the Martian wheels, one for summer tires and one for winter.