Blower or blower vacuum tools each have their merits. Currently, I have a blower as I'm happy to blow everything into a corner and then pick it up and place it in the green waste bin.
If you have nowhere to blow the material or a copious amount of it, then a blower vacuum could be the way to go. One key feature of the vacuums is that they mulch the material down before collecting it in the bag. This means far less material in your green bin, or you can use it to mulch around your plants. However, a blower vacuum is always larger and more cumbersome.
I've gone for a battery blower this time because they are light and very convenient to grab when needing to do a quick blowdown of an area. They lack the oomph of a corded 240v models but are always ready to go. I would only consider a petrol machine if you can't access power and need something very powerful. Otherwise, you're dealing with servicing and starting the machine, which can sometimes be troublesome.