I know alot of comapnies make B&W fishfinders,Ive found one made by Garmin which is color. I can pick it up for about $160.

Just how much defference is a Color vs Black and white fish finder. Are color ones easier to read?

I've just recently made the switch from B & W to color on both units.  This after playing with a hi def B & W unit on the front of the boat for 6 months.  The color finder appears to be a little easier on the eyes to read but regardless of which you get, color or B&W,  it's worth the money to get a higher definition unit.

Too me, I've always used an old Eagle Mach 1 paper graph I used to own as a bench mark for comparing LCD's as far as definition.  The higher res units from the past few years are finally matching that old paper graph for detail.

And without the mess.  

Look at the resolution of the unit.  That cheap Garmin color doesn't feature very much resolution.  I would rather have a high resolution monochrome graph than a low resolution color unit.

I've found color much easier to read.  I see things I never saw before.  

Color, color, color.

I'd opt for the color.  Though the units are called fishfinders, I have yet to see the arches of fish you see in the demonstration mode.

I don't use it to find fish.

I use it to find structure, bottom types, and bottom transitions.  I used to be a commercial lobsterman who used a "sounder" to find lobster holding bottom.

I had a high tech (at the time) paper recorder, using 12" paper rolls.

Then I got a Furuno color machine.

Hard rocky bottom showed as red with a trace of a yellow line beneath.  But, in places there was more yellow, and where there was more yellow, there were more lobsters.

You'd never see that subtle difference in monochrome.

While the coastal lobsters don't stray far from home, bass do move around.  Most of their movements are related to structure, be it to spawn, find food, or a certain comfort zone.

The better you know your quarry, and the better you know the environment in the places you fish for them, the better your success rate.

If used to it's capabilities, the color unit will glean more info for you than a monochrome.  

Is it worth it?  Only you can answer that question.

Color is easy on the eyes but high def is a must I think here you get what you pay for JMHO.

If ur using it to find fish,bait ,air bubbles go with color if  ur like me and mainly only fish 10 foot or less to find structure,and depth differances less is better IMO