I love my Fizik R5B - though any recommendation for shoes comes with the caveat that you need to make sure they fit your individual foot shape. They're not the very stiffest but they're light and comfortable, and a good fit for me.
Even for a non-racer, weight and stiffness of your shoes can make a difference on a long ride (I say this as an audaxer who has had problems with foot comfort on very long rides). But fit remains by far the most important consideration.