Not sure there's a best because I'm sure there are many that are very good at different things.
I just purchased my first 30% gasser and first decided on which airframe I liked the best just from looks. The Edge was the winner for me so then I started looking at the manufacturers of 30% Edge's such as WildHare, BME, and such.
I then spent several hours researching them on RCU and watched a great thread on the BME Edge and felt that everyone really like it and purchased one. Now is it the best. I have no clue, but it's the one I bought and I love it.
Good Luck