I would highly recommend the Garmin series finders.
I just picked up a 240 Blue a month ago and really like it. The on-screen menus to adjust the settings are really nice.
The unit is right at your price threshhold. The only difference in-between the 160 and 240 are the screen resolution pixel counts. You could save a few bucks if you want to go with a lower resolution screen, but the go with the 240 if you can. You get alot of bang for your buck. Sped, temp, voltage and depth readouts.

AkKings from the board here works at Boaters World in Everett where I bought mine. If you have any other questions he is the pro.
If you buy one pick one up from Boaters world. They had a good price when I shopped around.

Good luck, let us know what you get.

Sky-Guy
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You know something bad is going to happen when you hear..."Hey, hold my beer and watch this"