Best Android Phones To buy

Hello people. I am looking for a good Android Phone. Well, i would like also for them to have Over than 5 mega pixels . I will be glad if I get Battery Standby: over 5 days Am a newbie and I need your opinions ? Thank you.

A friend suggested me this Product From a Chinese Store :

http://www.ankaka.com/original-lenovo-a800-3gmtk657712g-dual-corerussian45-ips-screenandroid-40-phone_p49634.html