wow all those bikes are sorta expensive for used bikes. are u sure ur size is a 53 but sizing is so important. no need to get a bike if it doesn't fit u well. i think all those bikes are lame. isn't a bianchi like 500 new. i see there are some upgrades with all the bikes but still. the eai is alumn and the bianchi is steel. you should decided if u want to ride steel or alumn first