Gibson Ridge is the best. Either GRL3 or GRL2. With GRL3, you'll get more products, like radar estimated rainfall. But with GRL2, you'll get level 2 data, a better UI since you can change products without going into menus, and you get volumetric mode (shown below) and cross-section mode. GRL3 is 80 dollars and GRL2 is 250 dollars.
First image is GRL3 and second is GRL2 with volumetric mode. Didn't have any good storms to sample right now.