Just about all the mid range finders offer some kind of "digital flasher", but to get the most out of it you really need a color FF. There's just too much going on in B/W to really see the separation IMO.
I know all of the Elite (4,5&7) series from Lowrance have the flasher, it's under the SPLIT/FLASHER section in the sonar menu. All of the color 'birds (385, 5xx, 7xx) have them also, I think you have to enable the "ICE" function in the advanced menu to see it.
Until I got my HDS7 on my boat, I used my Marcum VX almost exclusively, for all the reasons Wallijig mentioned. I was temped again to dig it out for crappie fishing this fall - just need to get a transducer mounted on a boom somehow so I can get it directly where I want it...