You can't sell what you can't stock. Availability is a retail reality that trumps everything else. If a device is constantly backordered, it doesn't matter how good it is. Check with your supplier on lead times and consistency of supply. The WINDBAR models are generally reliable, but it's worth asking. Also consider how many SKUs you want to carry. A deep lineup is good, but only if you can keep them all on the shelf. Sometimes a narrower selection with reliable stock is better than a wide range that's often empty.