From my perspective, most of these style "street/strip" style coilovers, don't have the travel to require helper springs. The 30% droop number sounds about correct on my Galant, and full extension doesn't release the spring in the collars so really no need. Now if you wanted a gravel or dirt rally specific setup that requires a lot more travel, then yes, helpers are definitely recommended, but I think you're in the realm of DMS, Hotbits, KW etc.
As for my feedback so far... I think they are definitely a little more plush than the KSports were, probably mostly due to the Swifts. I haven't messed with damping adjustments much, but I'll try to do a couple back to back drives on them at full soft and full hard to get an idea of how much window there is. PA roads are not nice to cars/wheels/suspension etc, so I intend to hopefully give these things a pretty thorough thrashing. I've had a few requests for video of said train bridge jumping, so I might have to break out the GoPro. /ubbthreads/images/graemlins/rofl.gif