Hey guys, I have finally purchased my first boat. What is the BEST depth/fish finder out there for catfishermen? I would like to have the following features/capabilities. A. Price - Under $200 if possible B. GPS - Not necessary, but would be nice. Maybe capable of adding at later date? C. Water Temp, Fish and Depth alarms a must. D. Are there models that will ID cats on the bottom (not ID type of fish, just fish rather than structure)? Would like to have fish ID, and size ID. E. Must be lighted, and rugged, of course. Most of the use will be on the river, with a little bit of lake worked in here and there. The boat is a 16' aluminum flat bottom, if that matters? Thanks guys and gals!