Reading the posts I saw you mentioned about 45 series tires looking too small. Are you still riding at the stock height? When I first swapped my stock 15" wheels for aftermarket ones in the same size I then got a set of Eibach Pro-Kit springs, and the drop was 1.5"- 1.75" and that was a nice ride height and really improved the look. I have had very good luck with Eibach springs as I have had them on 2 cars and you got the drop to improve the look, but not a harsh ride as some other springs out there.

I currently have a set of Ground Control coilovers since I swap my winter 15" wheels for my summer 17"s and adjust the ride height- the GC's use Eibach ERS springs in their setup.