I just purchased a Capri 22 wing keel and need advice on installing a depth finder with speed indicator and water temp. 1) Has anyone had good luck with a fish finder or is a higher price marine depth finder the way to way? 2) Where is the best place to locate the transducer on this boat? 3)Is there other companies that specialize in sailing like West Marine, where I can order catalogs? 4) Who has a good selection and prices on instruments? Thanks