Is there a product you can recommend as "The Best Omnidirectional FM
antenna"?

If so, which one is it? (brand/model and/or URL please)

Oh - one significant constraint is that it cannot be larger than about
3 feet (1 meter) in any dimension, because it is going to be installed
in my attic. I know it cuts the signal by 50%, but I am willing to
live with that since I am assuming that if a whip antenna on a
portable radio works great in my basement, a **good* omnidirectional
FM antenna in the attic must work *at least* as good...

An extensive search yielded only the Triax omni FM:
http://www.towerhillaerials.com/view...&orderNumber=0
But where can you buy it in the USA?

I also found an ANTENNACRAFT FMSS at STARK Electronics:
http://www.starkelectronic.com/acantena.htm#FMSS, but the specs at
that site say Boom length is 8' and Maximum Width say 55'. These can't
be feet, right? They surely confused the foot symbol (') with the inch
symbol (") - or did they?

Anyway, any tip you can provide on finding such an omnidirectional FM
antenna would be highly appreciated. VHF/UHF omnidirectional antennas
that do *not* trap the FM band with a notch filter are welcome, too.

Thanks,
Lynn