Westsam,
I wouuld call Lowrance directly, and ask them if they would be willing to take your old graphs in exchange for vouchers for new ones? I had 2 X-75's and they took both of them from me and gave me vouchers. I ended up buying a 332c and a 102c. Saved about $180 on both. If you want a good graph I would go with the X135. Buddy of mine had it on his Skeeter. Great graph, and detailed for a non-colored graph. Also, you can talk to the tech guys at Lowrance and they can recommend a graph for exactly what you want. Hope that this helps you out.
"If people concentrated on the really important things in life, there'd be a shortage of fishing poles."
Dave