Generally solid covers offer the smoothest off the point - which would be the rumble or shout. The cross road and hy road would be a step down from your IQ Fusion and are great smooth rollers.
The wrecker (hybrid) and uproar (pearl) can be quite angular, but I do not know how much cover adjustment / drilling can smooth them out.
The new outcry is a hybrid using the uproar/rumble core, it may be worth consideration as well.
Of the three you mentioned, I think the Lights out is probably the smoothest off the point. Surface changes - I would not even attempt to guess.
