I'm wondering what you people use as a portable (Battery powered) strobe set-up. I currently have a lumedyne kit that gets me to about 400WS, but their system is a bit hokey. In LF, 400WS is barely enough for maybe f/11 without getting the stand in the frame, and furthermore, it's barely enough to balance the strobe against broad daylight with 100 speed film and an umbrella. I'm interested in power--maybe 1200 WS --enough to make daylight look more like fill while the strobe becomes the key light--in a soft box or umbrella. What do you folks use? Is it cheaper and maybe more practical to either rent or buy a small generator and drag out studio strobes?