The Sunpak 383 Super has been very popular for years, and endures today as a sensible choice for photographers desiring strength, reliability and value in a travellable size.  The manual, undedicated 383 Super is simple to use, with three aperture-priority exposure settings and a great manual power scale.  Its combined guide number of 120'(37 m) and ~63° illumination angle remains hard to beat.

Add the optional battery pack and an optical slave, and you'll have a great second light for speedy, powerful background room illumination to go with your TTL system upon your camera(choose a "digital" optical slave is triggering the 383 Super off-camera from a preflash-emitting TTL system from Canon, Metz Nikon, Olympus, Pentax, Sony, etc).