I am looking to buy a bike to commute to and from work and have been looking at either:

Felt QX75 (2015)
Felt QX0D (2014)
Giant Escape 1 (2015)

I do not know if these bikes are the right thing to look at or can you suggest something else.
I will be using this bike to commute approx. 80 miles a week (16 miles a day round trip). Mostly on the road / path (Cycle path).
I have not ridden a bike for many years and am not particularly fit so "easy to ride" would be a plus (light and quick?).
I have a budget of £500 for the bike itself.

Any help would be much appreciated.