Simon the thorax air bag is located in the standard sports seats, so you loose them because of the buckets.

I can understand why you want the buckets they do look great in leather & hold you very well whilst adding to the sense of occasion! But just be aware that it does get tiresome clambering in & out if you are using a fair bit, I'm plenty agile enough to get into them as well but elected not to get them & don't regret it, plus the small matter of Pounds3k extra!!!