West Basin,

Thank you very much for all the thoughts and information. You pretty much confirmed what I suspected was going to be necessary... I need to basically start from scratch due to the age of my current equipment.

When I said I wanted to see marks at speed, I meant while cruising along around 20 - 30 mph. Captain Juls seems to be able to spot marks while she is under way. I would like to be able to at least identify marks without slowing way down. Basically I don't want to be passing over fish and not realize it.

I'm sure I can mount a transducer on the transom, but I would rather have the more protected thru-hull type, if I can get good functionality without spending a fortune.

I will check out the link you provided and probably pay a visit to those guys in Columbus. I've read so much about the big three, being Garmin, Humminbird and Lowrance but I don't know which direction to go yet. I'm sure it's like asking for advice buying tires... many different opinions out there. In the end they are all so much better than what I have now that I'm sure I will be happy with whatever I decide to purchase.

Thank you again for taking the time to provide such an informative reply.

Ted