My portable Fishin Buddy bit the dust and I'm wanting to buy a unit today and have it ready today to learn on tomorrow. This is spur of the moment but thats how I've grown to do things. Besides, this unit is for my bucket, small portable boat that I dump into hideaway holes and such. I'm currently looking for a larger boat with trailer in which I will spend more time doing electronics research for later.
My budget is $250 with tax. Would just like to get the most features for the buck, today. Any recommendations would be greatly appreciated, b/c I've never had a decent unit.

thanks,
Adam