Eagle CUDA 250 S/Map. It is a Black and White combo unit with an internal WAAS antenna and preprogrammed mapping - all for $199. The unit is easy to use and the display can be seen perfectly even in this intense Florida sun. Eagle is owned by Lowrance, so you know it is good stuff. It even has an controllable cone angle 20-60 degrees - depth to 600 feet. It has GRAYLINE technology to differentiate the bottom - hard, soft, grass, etc. I like the unit I have (older 240). It comes with a one-year warranty, but I purchased an extra two years for $39.99 from LEI - cheap insurance in my mind.
I think you would be very happy with this unit - save the rest of that hard earned money for other toys!