I am looking at these B+W Graduated ND filters. I'm just at a loss whether to go with 1 or 2 stops. I spoke with a B&H salesman and he did say that it has the same action as a CPL, where you can rotate the direction of heavy density, top, bottom and all points in between. So, anybody have an idea which one to go with? 1 stop or 2. I live in the SouthEast USA and summer is coming up *read: hot, hazy and humid*. Thanks.