I am in favor of the ANT751 on the balcony or patio that is in the direction of west south aimed at about 179 degree magnetic compass will receive many Tv stations/channels.
Here is how to aim antennas .
http://www.kyes.com/antenna/pointing/pointing.html.
Endless information debates do not produce any real and actual Tv watching.
Here is a antenna mount that works well on patios and balconies , makes a great STAND no requirement to bolt it to the floor.
http://www.ronard.com/909911.html.
The best way to get the coax from the antenna to the Tv is a hole through the wall.
Here is an other way ,
http://www.hollandelectronics.com , Flat coax # 144823.
Also , J mounts , work well to mount on the railing.
Type the word or words , J mount , J mounts , antenna J mount , antenna J mounts and etc. in the solidsignal search box .
http://www.solidsignal.com