I have 3 that I use. All read within 1 lb of each other.
The best is an older made-in-usa Accu-Gauge. It's the analog round gauge style, supposedly accurate to .1 pound. It doesn't fit very easily on motorcycles due to the geometry. It has a pressure bleed off valve so you can keep it on the valve stem and bleed off the pressure down to precisely what you want. I love mine so much I bought one each for my wife and daughters' cars.
The newest one kept in my Versys kit is a RoadGear TG101 digital programmable gauge. The geometry is perfect for getting into the tight spaces on motorcycle rims. Accurate to within 1 lb according to the manufacturer, digital readout to the nearest .5 pounds. Programmable with front and rear pressures for quick reference. Built in light which is quite handy in dim conditions.
The third is a basic pencil style which was supposed to be accurate within 1 lb, and not some super cheap model, but not expensive either.
I have always been a fan of excellent tires, on cars and bikes, kept at the correct pressure for the situation. Any decent gauge used regularly is good enough, and better than the best gauge never used.