I like the Dosy meters for CB myself. Who can afford about $450.00 for a used Bird and a couple of slugs? I use a PD 1000 TS Dosy and it's within a few watts of a friend's Bird.
Depends on what you want to use it for. Dosy's make most people feel good because they tend to read high especially on peak power while the Bird is a rugged and more reliable meter suited for test bench applications and where certification is required. They are not necessarily any more accurate than other meters despite what people think about them. At least with a Bird meter you can use different slugs for different power and frequency ranges making in an all in one meter. Coaxial Dynamics slugs are compatible with the Bird meters and are much cheaper.