If you have a lot of leaves I would strongly consider going with a backpack over a handheld.
I originally went with a Stihl BG-86, the strongest they make (made?) a few years back. It did great, although it took longer than I wanted to spend and you can really only blow into separate piles. Then you still need to rake them onto a tarp and drag them wherever you need to.
I did this for two years and got tired of it, so I started looking at backpacks. I wanted something with more power so I looked at the biggest available. The top three were Stihl, Echo, and Redmax. Around here there are a million lawn care companies, nobody does it themselves on my street except for me. They all use Redmax.
Going to the local lawn equipment shops and talking with guys that run the lawn care companies they all recommended Redmax over the others, citing reliability.
I went with the Redmax EZB8550. It's a big boy, but it will move anything. Sticks, leaves, rocks, mushrooms, maple seeds, pine needles, etc.
Buy once cry once