The Civic's styling doesn't seem to be wearing well IMHO. This is a startling admission, given that about this time about 2 years ago I was seriously thinking of getting either a Touring or Si Coupe. That said, larger wheels aren't going to fill your wheel wells any more than the standard size ones assuming you keep the same overal diameter, which is something you need to do unless you want to introduce speedometer error. They might *look* like they fill the wheel wells better and that's the whole point, isn't it? That, plus the consequent shorter sidewalls aiding in handling.
I like the Kona. Those small SUV-lets are pretty practical and in the Kona's case it is also nicely proportioned. Certainly nicer looking than the HR-V.