I highly prefer the 320 lumen model. The battery life is exceptional, the emitter is small and throws a clean beam, and the regulation scheme is simple and rock solid. I'm not a fan of the "lumen wars" upgrades at SF. The lights are being driven super hard now. Lots of current, poor battery life, bigger emitters than the reflectors were designed for throwing sloppy beams, and regulation that's either poor or trying to be clever with voltage boosting and stepdowns. The last handhelds that I liked from Surefire were the 320l G2Xs and the 500l Furys (which had the correct-size reflector for the larger emitter). Its too bad that SF has fallen for the lumen wars instead of sticking to their target market which is best served with the simplest and most reliable tools rather than flashy specs for trade show banners.