I went through a quite extensive research project in terms of wheels/tires.
I by no means want to give the impression that what I did is the best or only way to only way to go. But I will share what I learned. I to wanted the aggressive look of the KO2s on 15" Methods - here is what I learned:
1.) TireRack did not recommend the 15" Methods because the break caliper clearance was deemed too close. However several folks have done this and report no issues - for me I felt better with the TireRack engineer's guidance.
2.) After talking to a former auto engineer family friend I learned that it would be prudent to keep as close as possible to the engineered wheel off-set and the overall wheel/tire diameter for both safety and performance handling. So keeping that in mind I picked wheels that had the same off-set 48mm as stock and tires that kept the overall diameter as close to stock as I possibly could.
3.) After driving my brother-in-law's Wrangler with big knobby AT tires (they definitely look bad-*****) I realized that being on pavement 95% of the time I did not want to live with the road noise. BUT - I wanted tires that were suitable for taking off pavement (since I am not an Aussie I am not going rock crawling with this car - check out YouTube, the dudes Down Under do some amazing, actually crazy things with these cars) and I want to take it on the beach.
4.) Last, I wanted a somewhat aggressive look - so the 2" lift
I went with the 16" Sparco Assetto wheels with the 48 mm offset same as stock. with the Yoko 235/60 GO15s these are a bit wider than stock but keep the overall wheel/diameter pretty close to stock. I did have an Anderson 2" lift kit installed as well. I have no rubbing and no handling degradation.
Here is a pic of my 2017 Crosstrek - I also share how it handled on a trip to NY form NC.