I will be purchasing a leaf blower and I would like a comercial unit or high end homeowner unit. Would anyone recommend the blower/vac combination units and if so which are worthy of purchase? I have been looking at Echos but I am confused at the various models. Echo pb260 pb46ln pb403 to name a few. Which is the better value for a dependable machine that will hold up over time? Any advice or suggestions is appreciated.