When all we had were G100PD/G120PD scanners, the LM amps were faster and more reliable than the General Scanning amps - in my experience. I blew up more galvos and broke more torsion springs with the old General Scanning 600 series amps than with the LaserMedia amps. I have used the LM amps many thousands of hours - easy to tune and easy to repair (except the high voltage op amps are out of production and hard to find now). The fastest amps I ever saw with G120PD's were designed by Fred Fenning of Image Engineering. They used +/- 48VDC supply rails as I recall. Scanner technology has really come a long way (finally). Bill's new scanners will raise the bar - I can't imagine mechanical vector scanning will get much faster.