Can buy either unit at Scheels for $199 .....Which one for the average walleye angler? I fish the missouri and several of it's reservoirs in south dakota.

The fishmark 320 is a better unit hands down. The fishmark 320 is a 2003 model with 320 pixels and 1500 watts power. The X-71 is a 2002 model and only has 160 pixel count with 1200 watts of power. The fishmark 320 has a much better screen period.

I would also buy your unit from Cabela's for the same price and get a free $9.99 screen cover.