Hello everyone! i am looking at buying a new backpack blower in the next month or so , and I cannot make up my mind. I'm debating between either redmax or stihl. My dealer sells both. here are the models I'm debating between: stihl br 430 stihl br 550 redmax ebz 6500 rh red max ebz 7500 rh I already have a stihl trimmer and like them, but their blowers seem a little weak. However, when i see a redmax they look very dirty and have a lot of buildup on them. Is this a problem with redmax itself, or just the user? any feedback is much appreciated. Thanks!