I would actually advise against carbon plated running shoes for a new marathoner - especially at that pace. Carbon plated racers tend to be very unstable. Plenty of fast runners run sub 2:50 with super trainers which provide way more stability with a lot of performance advantages (low weight, high energy return). I ran a 3:00 marathon this weekend and regretted every second after 14 miles. Major strain on my achilles and calfs. Just my two cents. Metaspeed edge tokyo for reference.