Here are a couple reviews I posted last year. Some here have made remarks about them being superfluous, but I disagree. I tried to give detail that anyone who is unfamiliar with the big BP's would appreciate, and several have said they did, so I guess they were worth it. There are a ton of BP reviews if you do a search. Maybe they will help you too-
http://www.lawnsite.com/showthread.p...lower+demo+day
http://www.lawnsite.com/showthread.p...=Blower+review