I really like my LW-50K scanners for the price. Probably the only good product from laserworld. They don't make them though. I wonder who does? After 2 hours worth of tuning, they make a great scan at 30K. They are not 50K scanners. The galvos don't generate any noticeable heat and the amps run fairly cool at 30K.
The only thing I don't like about them is the max scan angle. I'm gonna try and raise the gain a little more and see if they can handle it.