I'm picking up my new Civic in the next few days with black leathers. I have sat in both cloth and leather seats during my test drive and found the leathers slightly firmer and more supportive. I also found the interior appearance much better
with leathers and went for black to avoid dirty marks showing up in the future.
Like you I was also considering the foglights but decided against it because £350 was too much for something I would hardly use and probably get stopped for by the police for misuse. Instead I went for the front bumper garnish in silver because that definitely improves the look of the Civic especially with the colour I chose.