I am in the market for some new off-camera flash equipment. My old shoot-through umbrellas have had it! Before I just go and order a couple of new ones, I wondered what members here thought about the whole umbrella/soft box comparison. I've never used a softbox, hence my query. I generally use these on location (mainly outside, but some indoors). I usually use 1-2 for a session, depending. Primarily portraits, although I do shoot the occasional wedding (have my sister-in-laws coming up in May). What are the main advantages/disadvantages to either of these? PS - to be used with speedlights (SB-800s) and Phottix Odin trigger/receivers.