Which sonar do you prefer?

[doitall5000]

I have another question, the transducer will mount on the transit close to the outboard motor How will this affect the side scan?  it seams like it would interfere. Will I need to mount it off the side of my aluminum boat?

You will most likely have to trim your outboard up slightly so the SI can clear the lower unit.  It's really not much of an issue as SI can only be used at lower speeds anyhow, usually 5-6 mph or less.  FWIW, I would look at a used 9" screen before I would buy a new 7" screen.  SI on a 7" screen is not very useful, and if you are going to run split screens with mapping and sonar, or any other combo, you will run out of screen in a hurry.  Another thing I would suggest, if this is your first time mounting a 3-1 transducer, of any brand. Mount a piece of starboard or similar material to your transom, then you can move your transducer around without drilling a ton of holes in your transom.  There is a very small chance you will get it set perfectly the first time.

Yes good thing to install a cover board, maybe a piece of white plastic,  or nylon. Thanks