truthfully even with an H&R race you wont lose to much on the comfort because your shocks provide the rebound (soft/stiff) yes spring rate does effect stiffness but not like you would think it would, basically dumbed down your shocks are your soft/firm and springs control your ride height. Obviously its more complicated than that but you know what I mean! Like on M5beasts I did an H&R sport and you could barely tell the difference drivewise but the drop helped alot for appearance. AFE intake could be another good buy!