He's had them on his GT-R and previous Z so he has an idea about the brand's quality.
Alex, you do sound obsessive-compulsive. Ha ha. In the last post you start by saying "maybe I'll buy them" to two paragraphs later saying "I'm definitely buying" (well maybe exactly in this words). LOL. In my opinion, if you want to lower the car and are concerned about performance, quality of ride and a balance between shock and spring, then coilovers are the way to go. Afterwards, get your car corner balanced once you find the desired ride height...it'll greatly improve handling for sure.
$1500 CDN is a decent price too.