Quite a few people have ranted about the fidget factor that comes with the eGo-T tankomizer setup. I would go with something that comes with attys or cartos, and then buy a carto tank separately.
J-TANKAs far as models go, if you like the idea of the fat batt, like the eGo, take a look at the KGO, Riva 510, or Smoktech EGO. If you go with the Joyetech eGo, just keep in mind that it runs at 3.3V, as opposed to 3.7V or higher, so you will need to get low resistance attys and cartos that run 2.0 ohm or lower.