Hello! I do quite a bit of photography work for others, but the majority of my work is done outdoors. On the rare occasion I do shoot indoors, I prefer to work with natural window light, with a couple of reflectors maybe. Because of that, I've never ventured into the world of flashes beyond my camera's built-in. I use a Canon Rebel XT (digital). So, I've long been wanting to set up an informal "studio" at home, mostly for photos of my kids (though I'm sure my friends & family will willingly be my guinea pigs, too). I've got a basic lighting set up on order for Christmas this year, consisting of two balanced fluorescent continuous lights with umbrellas. I'm wondering, then, would you recommend an additional on-camera flash, also? Thanks for any advice!