I have ridden in a couple cars with tein suspension. Very comfortable if its adjusted for that. Sure you can make it so that even a pebble nearly breaks your neck, but they are pretty comfortable for the street, some people even say it is actually smoother and a nicer ride than stock... I didn't know about JIC and Tein having the same distributor.. however on that note, Apexi and Megan have the same distributor aswell.

As for as stance, people are starting to put them on their IS's and loving them so I would give them a nod aswell!