testing/unstable reccomendation

I understand there are no security updates for testing/unstable, because they are so fluid, but what exactly is the difference between them and, between the two, which is more reliable and better for someone who wants bleeding-edge packages that have at least a safe level of critical bugs? = -

use of dbootstrap and debootstrap

Looking through the Debian installation and reference manuals, I found references to both dbootstrap and debootstrap. What exactly are they, what is the difference between them, and why is there a debootstrap package, but no dbootstrap package. = --Joey-- __ D

Which release

I am installing Debian on a Internet-capable computer for experimentation and a way to continue learning about Linux without the limitations of a live CD. Should I use stable, testing, or unstable? My preference would be to have the most recent packages, but also somewhat tested, so should I use