Welcome to the Forums! And now for my $0.02:

-Any of those bikes will serve your purpose.
-Don't get your heart set on a model that you see online- your LBS may not be able to get it for you (distribution restrictions) or your size could be out of stock.
-Don't base your opinion solely on the listed weight. The reason is because a) parts/components can change and affect the total weight and b) some manufacturers will list the weight for the smallest frame size instead of for each frame size.