[Perfectlap]

I would not do coilovers unless you plan to spend ample amounts of time at the track. Autocross will bump you up a class at least without the HP. Any adjustments to the ride height, done properly, requires a whole new set up by your indy specialist to get it properly balanced. My indy does not do that cheap.
On public roads your car will take a pounding and things will start to rattle more and come loose. On a convertible that already has cowl shake to contend with it just makes the rattling even worse.