Hello all, I'm looking to upgrade my sonar this winter and want a nice big screen with crisp color resolution. Good at picking up walleyes up high down low and everywhere in between. Good enough for me to tell the difference between a walleye, a sheephead, a steelie, and a log. To see the thermocline. GPS maping with the best underwater topography. I primarily troll and perch fish the central basin, and like to do the same in the western basin 4 - 6 times a year.

I'm looking at number of Humminbird (700, 900) and Lowrance(HDS, LCX) units that would probably fit the bill. I'm willing to drop a good chunk of money for reliable performance that won't be obsolete in a couple years. I'm interested in any opinion, and have read a bunch on this site and others, but am really wondering how SI has helped, or not helped any of you trolling for walleye in Erie. Especially the Central basin.

Thanks for any info!