Weaver hopper cars were designed with NMRA standard compliant bolsters and coupler pads. There have been many brands of trucks produced with NMRA compliant bolsters. Among them are Kadee, Athearn, Weaver, and Intermountain. Unfortunately, Atlas trucks (and freight car bodies) do not have NMRA compliant bolsters. Since the AtlasO truck bolster is higher above the rail head than the NMRA spec, when an Atlas truck is mounted on a car with NMRA spec body bolsters (like a Weaver hopper) the car will ride noticeably higher than the prototype.
For good-looking low-priced Bettendorf trucks, it is hard to beat Intermountain plastic ones fitted with Intermountain metal wheelsets. Assembly is required but once you learn the process it takes less than 15 minutes to assemble a set of trucks. Appearance wise I favor Intermountain trucks as they have brake shoes and realistically heavy looking plastic springs. Properly assembled they equalize over uneven track better than most trucks with working metal springs. I have several hundred in service on my railroad and haven't had any failures in over 30 years of operation. A typical show price for Intermountain trucks is around $12.