I like my Garmin Echomap 73sv. I'm good as long as I wear my glasses. No chirp but I don't do no twitter anyway. Look around, lower price than the chirper.
The maps have MO lake brushpiles already on them and are pre-installed on the unit.
I have a Garmin Striker up front, DownVu & standard locator, I like it also.
My $.02.
Go to Bass Pro Shop or Cabela's and play with the locators, they will answer your questions.