Definitely WON'T be going with coilovers. Went that route once before, and they were $$$$ plus very noisy, and ride quality was so-so. For the street, I use Swift Springs of Japan exclusively. These are one of the best springs made, and many people that do have coilovers actually replace their springs with these! With their street springs, they are one of the few companies that make their lowering springs to work with the stock stroke of the stock shocks. So you have a great ride, a nice little drop, and better handling without blowing out your shocks.
The wheels are 18x8, and the rubber is a 40 series, so plenty of sidewall. Tires are 225/40. It's definitely an illusion of the pics. Just the sidewall has the tire shine gel on it, so it really "pops" out at you. Look at the 2nd to last pic...the front tire. See the tire shine makes the sidewall look puny?