I'm after a set up for a studio type shot. I don't have much experience with external flashes and studio lighting, but I got this gig... I need to take an action shot (jumping in air) of one person in a large darkish gymnasium with horrible lighting. Would you recommend the fl360 or the fl550? Would I need a second slave unit? I know the Olympus flashes fl36 and fl55 are slightly cheaper. Do they work the same way and guaranteed compatible? Also what kind of spotlights, umbrellas and bouncers would I need? It's really important that I get this right. thanks.