I am brand new to this forum and would like some advice on a new backpack blower, even though I am sure this has all ben discussed before. I am considering any of the top-of-the line models of Shindaiwa, Echo, Stihl, or Redmax. I currently own an Echo PB-755 and love it, but haven't used anything other than a Husqvarna 125BT (25 cc)and a Stihl BR340 (44cc) lol. I have also had good luck with all my other Echo equipment. Anybody have experience with the brand new Echo PB770!?