If you want a single reg setup (i.e. reg on the tank, but a gas-thru foregrip instead of a front reg) for higher flow, your choices are Max Flo or Conquest ('03 or later.) If you keep the foregrip regulator, it really doesn't matter too much which tank reg you use, and there's a lot to be said for the simpler preset tank regs for the lower maintenance and easier attachment/detachment.