I want to get a Seaquilizer descending device but not sure which one to get the 50/100/150' or 100/200/300'? I realize the answer depends on fishing depth but bottom fishing will be new to me next year so I'm not sure what depths I will most likely be. Mostly will be fishing around the Comox Valley, south of Hornby to Kitty Coleman humps. Down the road I'd like to venture to other Island destinations including the West Coast. Thanks.