We have a Horizon Stealthwake - we went with it for two reasons 1) big enough for a lake, and 2) small enough for our pond.
So far it has been pretty good, as far as the boat is concerned - when we turn it on, most of the times it is fine; occasionally, it runs slow and turns poorly, when that happens we bring it in, shut it down, and restart it and it seems to fix the problem. It uses a 6 cell, 7.5 NiMH batteries, it came with a 2400 and we bought a 3000 for the back up. With a truck we can run the batteries dead and not worry about getting it. With the boat we tend to bring to to shore before complete dead and don't want to just sit and run it since it is supposed to have water running across the motor to cool it. In short time the batteries developed a pitiful memory. I am going to be asking about LiPo vs NiMH on another thread.