I have the HRs w/Konis and when i went to get my tires put on, they were able to fit a floor jack underneath, but they used a small rubber block and layed it on the jack to jack up the car. If you don't know what i mean, i can explain it better.
And the ride with HRs is great with the Konis on the softest setting, although i have the front 2 turns.