DaveC wrote:
Looking for outdoor omni "whip" antenna for 2.4 GHz.

Is there any reason to not go for the greatest gain antenna, given that cost
is not too important (within reason)?

There are scads of these on the 'net. I'm looking for someone who has
experience with one or more of them and can make a recommendation for one.

Thanks,

There are 1/2 wave antennas on the market which do a decent job. I have
found their biggest problem is the coax the manufacturer ships with
them--too low of quality and too short.

Here is an article on one you can homebrew yourself, from ANY USB wifi
card:
http://tinyurl.com/6xdfav

-- or --

How about one of these?:

http://tinyurl.com/5ocovb

used with a 25 ft. USB extension cable, I use it when traveling. Plus,
you bypass the need for expensive/lossy SHF coax ...

Regards,
JS