Hey to all other landscapers waiting for an early spring. I want to buy a new backpack blower this spring. I used to have Toro's 41cc blower. Then I bought the Echo 58cc model. After that I bought 2 Echo 63cc blowers with an air volume w/o tubes of 620 cfm. I've been checking the net and with my equipment dealer and am considering the Stihl BR 600, the Redmax EBZ8000, and the Shindaiwa EB8510 and EB8510RT. I'm a big guy and have no problem carrying a heavy backpack blower. The Shindaiwa is rated most powerful but costs around $600.00 compared to the Redmax for around $500.00. Anyone used any of the models listed above ? Which model is most POWERFUL from your experience ?