Which is the best baby carrier?

What you like. There are many infant carriers available. Try out a couple and see what you and your baby like. Some like the moby wrap as it keeps the baby very close to you, others like the functional baby bjorn or ergo infant carrier. The best carrier is one that your baby will be happy in and is comfortable for you.
We really... We really should not endorse one brand over another. "hard" carriers are better than slings, of course, and for the bigger, heavier babies, many parents prefer belle baby which puts the weight of the baby on the parent's hips, not on back.