I currently have a hedge trimmer attachment for a Shindaiwa t230 string trimmer. I like it but find it too long for some work and would like to add a smaller hedge trimmer. I can't decide between getting an Echo SHC210 model, pictured below or a standard stand alone unit from either echo, shindaiwa, stihl or kawasaki. The echo model pictured below is a little more expensive but what concerns me the most is the 21.1 cc engine which my dealer feels may not be strong enough. Any thoughts or advice would be appreciated.