Thanks for the comments, especially the suggestions!
The reason I got 15's is because I wasn't going to get anything, but then I found out that my sidewalls were rotting and could blow out and the paint on my wheel covers was coming off. Since I had to drop $200 on new tires anyway, I decided to look for a rim/tire package that would fit in my lowly budget. I got these because I got the rims and the Sumitomo tires, with the tuner lug nuts and the tool for $425 shipped.
I am planning on getting a spoiler. I have my heart set on the spolier used on the 99+ Grand Ams but I want to see what it would look like first.
Window tint is definitely on the list. I have to find out what's legal and how much it costs.
And juicy-j, thanks for the suggestion about the tails. I think the main reasons I did things this was was because this is leghal and blackouts aren't, and with the exception of _hec_ whose idea it was originally, no one ense that I know of has tails like this. Plus I think they look good on the white car with the grey gfx.
I'm trying to make the car as white as possible. I think the next (inexpensive) thing I do will be painting the door trim white.
I also need to replace my suspension. If I come by some free lowering springs I'll throw those on too but I won't have the money for that for quite some time.
Thanks again for the comments and suggestions! I'd love to hear some more ideas!