I'm in mood to buy a couple of echo blowers for this season.i bought one pb2520 but the '2620 is on back order and they don't know for how long. I've still got my old stihl hand held so I'm not stuck, should I buy a second 2520 or is 2620 worth waiting for. The 2620 has a couple nice features, the bigger air filter, second tube with duck bill end and steel ring on end of round tube which the 2520 lacks. is it worth the wait.