Canon Speedlite 580ex Ii Flash Light

lighting equipment, sparks?
I think to get Speedlite 580EX II for my camera (Canon Rebel XT). I no lights at all. If I thought that was the best thing for it? Do you think it is better to invest first? Other: Other flashes lighting, light boxes, alien bees, etc. .. I have a background, a tripod and everything, but no lighting equipment. I finally want to buy more, but I am more a little at a time. Any advice / tips will be Useful! Thank you I'm taking photos indoors and outdoors. The lighting is a problem when I shoot inside .. volume internal and external photos. When shooting inside I have to hit the ISO up high and I do not want to do
If the flash is an excellent starting point – the notebook can take it anywhere. To start saving for people on the photos to give a twinkle in his eyes and nose shaddows fill any unpleasant. A
Unboxing Canon Speedlite 580EX ii