FWIW I've discovered not difference in accuracy form most expensive to least expensive digital gauge. Consequently I usually buy the cheapest I can find, but I do like the ones with replaceable batteries.
O'Reilly's was closing out some pencil type digital gauges for $2 each and I bought 6 of them. They all are within a pound or two of the rest of the gauges. IMO paying over a few bucks makes no sense when it comes to digital gauges. I try to get the Slime gauges on sale for around $7. I'd like to get a digital dually gauge but haven't felt like shelling out the dough.