which rim?

[lenientism]

I am considering to change my 960 wheels from currently 15. The choice would be 17, I don't think any rims bigger than it still give enough comfort on driving. I feel great with the 15, I believe the smaller one like 13 of my Cressida gives the best comfort. I am looking for the best compromise between comfort and nice looking. 17 I think decent choice, not sure how will it influence the suspension.

Anyone can give me advice, please help.