Hi guys, I might be in the searching for a flash real soon form my Rebel XS. I do not know that much about equipment and I would like to get a little info before being told stuff by hungry and or incompetant salespeople in the stores. I do not know anyone that knows cameras well to come with me... best quality price ratio would be what .. What questions do I need to ask... What do I need to avoid. Can I go 3rd party and have equivalent quality for less... Thanks for the help guys..