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As for what the pros use, I could care less. I only pay attention to what the most successfull fisherman that I know use. And they ALL use Vexilar.
most pro's fish with vex cause they get sponserd by them and they have to. and the marcum lx-5 does have a low power setting. I dont know I'm just not impresed with a vex, it just does not do what my showdown can. expecailty in the weeds with a vex you see this blob of greens reds and yellows, you cant tell what is what, with my showdown the weeds show up as a light gray blob, and when a fish comes through it shows up as a solid dark black line, there is no guessing