Ed,
I have heard so much good about quads vs. yagis.  Like you I've had 
the multiband Yagis and been happy - never tried a quad.  But a 
number of friends have had both and say quads are the best way to go.
I am in a location lending itself to wires - I won't go through the 
expense and hassle of another tower so guess I'll nhever know!!
If you are going to Dayton you can get some hands on and make a decision.
Good luck.
Pat, K9JAUAt 05:28 PM 5/2/2011, you wrote:
>I would like some feedback about antennas.  I have had tribanders and four
>element yagis and I have been thinking I would like to try a three or four
>element quad.  have you any experience with both and what is your ideas.
>Also wich is a good brand? Thanks and 73
>Ed  K7UC