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I really really like my Marcum lx-5. The Super Fine Line mode is incredible.
http://i248.photobucket.com/albums/gg162/bronzeback5/ntsa_1.jpg[/img]]
LOLOLOLOLOLOL...THATS GREAT
Have had an FL-8 (all they had back then) for near 20 years now and it does everything I need it to, so's I haven't been able to justify buyin' one of the newer models. That said, if my pocketbook allowed and I was buying a new one it would probably have bottom zoom and dual beam transducer, as I think zoom would come in handy and I've purchased a wide angle transducer for mine (now have a 9 and 19 degree). The rest of the bells and whistles are just that IMO.
Honestly it comes down to what you want for features! All I need is a 3 color flasher that has adjustable gain. The zoom feature is nice because most of the time all the fish are within the bottom 5 or 6 feet.All the vexilars will work great and help you catch more fish. You're just paying more for something you don't really need, but is nice to have.
I bought a vex 8 last winter. I guess i dont use it right, because i dont move around much. I use it to find a certain depth of water, and when i find what im looking for i catch fish. It is fun seeing fish on the flasher though.