H&R Race springs are very stiff. The reason they're called "Race" is because they're stiff, not because of some insane drop that they provide. If you're just looking to lower the car and don't have any sort of competitive driving in mind I'd go with the Sport springs, they'll be a much more tolerable setup for daily driving.
The rates for skunk2 coilovers are 500/400 lbs F/R.