My personal opinion: 4Sevens, you can't go wrong with. I have 3 and love them, however, the Quark's I dont really think are known for their throw, rather they tend to be more of a nice, useable mixture with some decent flood. I don't know what particular Quark you have, I can only speak for the AA, AA2 tactical and Mini AA2. The Quark 123 series might be a different story. Then there is the Maelstrom line which throw quite a beam as I am looking into both the G5 and the X7. As for ITP I also have a few of the EOS models. I know that they hold up really well and like 4Sevens, they make about as many different models/battery configurations as a guy could want.