I am running 4 older Echo HC 150's.
The newer units may have that finger shield between the tines, so be aware to do some modifications or take it off.
I believe all new units will come standard with the finger, large twig deflector between the blade edges.Other than my response, any of the usual Stihl, Echo, Husqvarnae, Shindaiwa, etc. has excellent cutting units. It is all about the money you intend to spend and the length of the cutting blades.
And yes, they are dual sided cutters.