It's not a matter of having a computer or not, that can come later. I wear mine on my wrist. Having a depth (if you don't have a computer) and pressure (mandatory) gauge are absolute musts though.
After thinking it over I ended up going with the Aqualung Titan reg, Tusa octo, and Tusa mini 3-gauge console and am going to put off the wet-suit purchase for a while until I find one I really like maybe I will just save up for a dry suit.