I'm pretty happy with my Echo PB-250LN(especially for $74.75), but noticed the upgraded rubber coated handle on your 255. I'm considering some type of rubber/foam that I can wrap my handle with to add that additional vibration control.
P.S.
That guy that posted the picture of the 1994 Echo hand-held he still uses every day gave me a "warm & fuzzy" about my purchase decision:0)