The model i would get if I was around $200 range would be the lowrance 4x HDI with normal sounding and downscan imaging it says it retails for about $250 but I recon you could get it for $200 It has some great feature
Have a read about it here: http://www.lowrance.com/en-au/Products/Fishfinder/Elite-4x-HDI-en-au.aspx