I was never a fan of Lowrance but their new units have me re-interested. I was looking at their top-of-the-line unit
http://www.lowrance.com/marine/Products/LCX-104C.asp which has some very interesting featues (recording for one) and a really nice 10" screen. Anyway while I was at their website, I came across their demo page,
http://www.lowrance.com/Software/PCSoftware/demos.asp
They don't have the 104c but if you look for the LCX-16 model you get the look and feel of it. It is pretty cool. You can download maps and emulate the unit on your PC...Feels like i am fishin!