If I had to make a choice given your situation and price range, I'd go with a Bottom Line Fish'n Buddy 1200. It's a bit ($10) out of your price range, but it will work for you. You're not going to find any locator that does a good job both summer and winter, but this one will do a good job summer and a respectable job winter. I don't like that you have to buy batteries instead of a rechargeable, but you have to make some compromises. I've had two of them myself. My first died within 8 months, but I was pleasantly suprised to receive a new one, no questions asked. Not only did they give me a brand new one, they gave me the next years model. I still use it. The side scan technology, in my experience, is a bit unreliable but has put me on fish through the ice on a few occasions in the past. The bottom scan is as good as any locator in it's price range, and it only weighs 5 pounds give or take. It's a nice unit for it's price, and it's very versitile.
kero