I have the nova 4. works great for a ua-5, mics, recorder (jb3 + iriver h120) and a shit-ton of batteries (3 dvd batteries, a power runner battery in it's case, a voltage regulator, assorted cables and connectors), as well as all of the other little things like extra caps, cables, and shockmounts.
Obviously, if you want some room to grow, grab the Nova 5.