Dan,
After checking out the Garmin GPS pilot III, 196 and the
ControlVision Anywhwere Map, we settled for the Lowrance Airmap 1000
paying around $700 for it last year. The reception seems to be much
better than that of the Garmin (we lost signals a couple of times with
the Garmin but never with the Lowrance on the same routes). The
resolution is great on the 5" screen (we use the dual mode HSI/map and
mount the Lowrance on the copilot's side at angle so that both of us
can see at the same time). It is also very to use and included
everything (yoke mount, external antenna, cigarett adpater and even
rechargeable batteries/charger). It also came with a StreetMap program
for the continental US. I did a quick check on the current prices and
seemed that one can get it for around $600-$650 (with rebate of
something like $175 for users of older Airmap). A google search will
show several old threads where details on the Airmap 500/1000 were
provided by several satisfied users.

Hai Longworth