Regarding covers versus wind when your NSX is parked outside...
CoverCraft sells a "Gust Guard" for less than $20 (you may be able to find something similar for less money) that includes two sets of adjustable corded clips (for front and rear) that will keep your cover on unless a hurricane hits. They are particularly handy if the elastic around the bottom edge of your cover eventually stretches. I've got my Gust Guards in place just in front of the front tires, and just behind the rear tires, and they work superbly. I also obtained two medium sized spring clips (the kind you may have at your office...black with chrome "ears" for holding documents together) and placed one on the lower license plate frame on the front of the car, and one on the lower portion of the rear license plate frame, after I fit the cover. I pull the cover taunt, then secure the spring clips front and rear. When everything mentioned above is used in conjunction with the locking cable that is centered on the cover and runs underneath it...that cover is NOT coming off.