Another plus for the Megans. I've been running them for a few years and I don't think the ride is much worse than the lowering springs we have available and you have the adding flexibility of adjusting them. I've tracked the car several times and DD it on occasion and honestly have no complaints.
I do also sell them (which has no bearing on my above statement, honestly) and they're on sale right now:
Megan Racing Coilovers - Maximal Performance