Look at Marcum or a hummingbird, same price as the 8 but more features. I have te Marcum VX-1 pro I bought it last year after much online research. Marcum has the bottom zoom, which at first I didnt think I would use now I wont go without. Vexlars 8 are left in the dust by these other units. hummingbird was my second choice.
They do help u catch more fish, no matter what one you use.