I'm looking to buy a portable lighting system for location portraiture. I've used the Ranger Rx in the past, but I'm thinking Dyna-Lite's XP1100 w/ 1600w White Lightenings would be a cheaper and more versitile alternative. I like the idea of having just one set of lights, but my question is this: Can you use 1600ws heads with the XP1100? Or will the light only put out 1100 ws? Furthermore, will I damage the battery pack? My reason for wanting the extra power is that I do group portraits outside in summer daylight. Also, for the cost difference, is the XP1100 that much better than the Vagabond?...OR should I just suck it up and get a Ranger, or Porty? Thank you for any advice that you can spare!!! Morris.