Link,
You were inquiring about CB antenna, (Citizen Band), CB antennas and radios are not what is being used on Winni. The guys use VHF marine radios and antennas. Yes, the 8 ft is what you want to get.

Definately go 8ft. I have a 3ft and it is useless for anyone out my view even in the broads. Even boats in view in the broads I sometimes get crackle transmission. I am going to an 8ft next spring too.

Thanks all for your input...8 footer it is, now if I can just stop myself from buying two more downriggers that I don't need!

I just put a new 9'6" Shakespeare model 399 on my whaler. It works great.