I also have an Airmap 500 that I like. It is easy to use and gets me where I'm going. It also runs my Trutrak autopilot. I'm waiting for Lowrance to get on the stick and offer a unit with weather. I had hoped that a unit such as this would have been out by the last Oshkosh flyin but no luck.
My only problem with Lowrance is their telephone support. When you try to call them, be prepared for a multi-hour wait and then to get limited help. When this is mentioned to them, they don't seem to care. On tech told me that they were the largest GPS supplier in the country and didn't see the need to change.
Good luck,
Tom RV-7A N175TJ flying