225/45/15 is about half an inch shorter than the oem tire and will give you a bigger gap at the tire well than oem. Maybe a 225/50/15 would look better and it should fill in the tire well better without rubbing issues. But I think you'll have less performance tire options.
I have no experience with how this would affect the use of spacers though...
Sent from my LG-H918 using Tapatalk