I've been shooting with a single 580ex for some time now but I'd like to introduce a second into my shooting for wedding receptions and such. I think it gives an outstanding effect. The trouble is, the IR firing is inconsistent at best. The past few weddings I've shot using the wireless master/slave trigger but it only fires 50-60% of the time. The pictures still end up working, but not having the flare I'm going for. So, I'm looking into other solutions. In the studio I use my strobes, but they're hardly portable and I don't want to run wires all around a dance floor, you know? I have some pocket wizards also. What do you think the best, most reliable configuration would be for shooting with two 580's (with one still mounted on the camera)?