ALLLL my opinion here.
I'm also with the same dilema, I have seen 20's with 245/45/20 (angies ride - not lowered) it looks real good. check out
Question for people riding on 20's
I have also seen the same setup with 245/45/20 and lowered with eibach, and IMO it looks fantastic on the car and fills the wheel wells - no rubbing issues as well. (probably what I will do)
Now, I have also seen 22's with the car lowered (a-la aspendog) and it without a doubt looks INCREDIBLE!!!! However, I'm not liking the difference in ride quality/risk of rubbing. (I have felt the difference with past cars and it's NOT pleasent)
just my $.02