Santa brought me a 1985 Sea Nymph 17' -50 hp Deep V Aluminum Bass Boat.What a surprise been remodeling it ever since mostly new wireing Going to be primarily a bay-harbor boat but knowing me it will end up North of Kelly's.Might start exploring trolling on "CALM" days.Our 32 ft.Trojan is great for family and casting but would be pretty expensive to troll with.I am looking at the 2015 catalogs comparing fishfinders and got a headache.Is side-imaging helpful?Does it show walleye when trolling?Want to install it while I am pulling wires.GPS is a must.Best for the money? Thanks in advance.Happy new Year..Hope to see everybody on the Lake soon!!!