Look at me starting the flame war. My Stagea is purely street grocery getter, I have other cars to take to the track. The car is already on its ring on Teins. Will be doing sway bars and decent brakes eventually. As for the performance/visual aspect I would err on the side of visuals for the M35, I'm not Hella Sik generally though.
I test fitted the 19x10 +38s with 255/35s off the back of my IS-F yesterday. The rears are perfect with no fouling, the fronts are a bit Hella for my liking though, and they rub the suspension upright. Nothing a slip on spacer wouldn't cure but they are already marginal.