TVFool, even if it presents a serious information overload: Who's going to spend a four- or even five-digit sum for the privilege of saying they get reliable reception of a station at a -25 dB NM?
Yes, AntennaWeb is highly conservative, but it should have been a great idea in that, with better industry participation, people could have used it to make intelligent antenna selections without having to become geeks. Alas, it suffered from poor execution thanks to spotty implementation of its pie-chart color codes.
Look online: Vendors such as Summit Source, Solid Signal and Warren Electronics include the chart or at least mention the zone on each product, but Stark doesn't. Winegard, AntennaCraft and Terk (of all companies!) publicize color codes for most or all outdoor models. OTOH, Channel Master doesn't use the chart, referring instead to the CEA designations underlying the colors, from "small multi-directional" to "large directional."
Radio Shack, a popular equipment supplier (Just look up and behold the number of VU-90s that still grace roofs and chimneys around the nation, 25 years after cable TV became commonplace!), doesn't mention color codes or CEA antenna designations at all. I've also noticed that the boxes containing the RCA all-channel antennas sold by our local Lowe's stores carry neither charts nor designations.
All of this was contrary to CEA's goal, which IIRC was uniform labeling in advertising and on product containers. I believe AntennaWeb would have been a better (if still very basic) tool if vendors and manufacturers had not wandered off in many different directions.