Have set a limit for myself not to spend over $700 on a fish finder. I know some of the best are in the $1200-$2000 range but I'm not a tournament fisherman. I just want to get on more fish. I've seen anything from side imaging to h.d. resolution. What is the most I can get in that range and what's the price difference between Lowrance and Hummingbird? They seem to have the same options but the prices differ? Which one is better? Also what is my best option for built in maps for fishing lakes? All the help is requested! Thanks in advance.