The best I've found for taste(and health too! bonus) is Amy's Texas style burgers in bbq flavor. All of her burgers are the tastiest though. After four years of gleeful Boca burger consumption I noticed their nutrition facts changing and the taste suffering as well. Also those Soy okara burgers are pretty good in a different way. I stick with the soy hamburger type varieties in all burgers because of the much higher protein content than the grain/legume style.
The refrigerated kind from Lifeline are really good too but too expensive.
Any others recomended?