LabSpokane, Got an Abus Granit Extreme 2500 U-lock today. Can confirm the mechanism quality is outstanding. This is a new generation of u-lock that is reinforced against battery-fed grinder attacks. They still can be defeated, but the time to cut is extended to multiple cuts over minutes instead of seconds.
https://mobil.abus.com/int/Consumer/Bicycle-locks/U-Shackle-Locks-Bike/GRANIT-Super-Extreme-2500