Well, there is no safest or best overall seat, so that could be why you're having trouble there.
A bucket style infant seat or convertible is a personal choice. Some people really prefer a bucket so they don't have to put baby in a cold or hot seat in extreme weather, or so they can let them sleep. Others really like using a convertible from the start. It really depends on your needs and preferences.
If you do choose a convertible from birth keep in mind they don't all fit newborns. Even if they say from 5 lbs, the harness straps may not be low enough. Off the top of my head, ones that do fit newborns are the Graco Myride, the Diono/Sunshine Kids Radian, Combi Coccoro, The First Years/Lamaze True Fit, Cosco Scenera, and the Maxi Cosi Pria. The newer Britax seats have an insert purchased separately to make the seat fit a newborn, and I have no idea about the Evenflo convertibles.
Are you expecting a big/tall baby?