I think the 15x7 snowflakes, not having the lip, are better looking too, because that snowflake face is all the way to the outside, which makes it more visible and bold looking. So, if you don't intend to use real big tires, you could use them. And used 15x7's are pretty cheap to buy, since they are more common. The original tire size would be 225-70-15. But I like a 245-60-15 on 7" wheels. It's wider and little shorter.
Not that the 15x8 isn't a good looking wheel too. And being wider does help some with handling, and being able to use bigger tires. Also, the lip on the 15x8 snowflake isn't chrome. The wheel is aluminum and the lip is part of the wheel, so it's aluminum. The lip isn't originally shiny, but many people like to polish the aluminum lip to a shine, so it has a "chrome-like" shine. Sometimes they polish the whole wheel.
This isn't my car, but a picture of a low mileage original that shows pretty well what the original appearance of a 15x8 is: