I'm thinking about getting a bike for first time and I've been researching about bikes recently. I was thinking about cheap walmart bike since I will just be commuting to work(about 10 miles round trip) but when I tried it... it was a JUNK!!
My LBS has

2012 Giant Escape 2 for $400,

2009 Cannondale quick 4 for $409 and

2010 quick 5 for $350 because it was a return from customer.

HElp me!! I'm new to BIKE WORLD and I REALLY NEED HELP.

They both look really good bike to me!
oh... and also... I'm 5'7" should I get M or S?