I'm in the market for a new depth finder and I'm looking for some input. What brands do you suggest -- or recommend against? What is a sufficient screen resolution? What features are important? Of course, money is an issue -- I probably won't be able to spend more than about $300. This will be going on a 17' Tracker boat. I fish mostly for bass, maybe some panfish. My fishing is mostly in the lake of central Ohio -- Alum Creek, Delaware, etc. Thanks for any input.