[50mhz] antenna question

[Greenacres113 at aol.com]

i'm new [just  a few days] to 6 mtrs. just tried loading  the tri-bander to 
look at 6 mtrs. and wrkd stuff so i'm ready to jump  in.
 
i'm thinking about a 2 or 3 ele yagi to go above the hf  tri-band ant.
 
i've been looking at the Diamond A502, Comet Ca52, Hygain 64dx  and the 
Cushcraft A53. any opinions on the best one.
 
my concern is performance, ease of assembly,  survival
 
bob k9il