Get the darkest legal tint you can have. I have that and its not bad, quite dark but not black.
Do the wheels now, they set the car off. Seriously. Do it. Now

Lowering I'm 50/50 on.. If its still above legal and nothing scrubs then sure why not.. Mine is bang on legal height and I can't wait to fit some taller springs. I'm geting fed up with scraping everytime a leaf blows under the car. Plus my XE front lip got ripped off because the front was so low.
Cheers
Andrew