First of all look what is your requirement and then move forward looking out for the product.
If you are more of a traveller then you need a big battery phone which lasts longer.
If you are more of a gamer then you must buy a phone with high processing speed.
If you love photography then you can go with the 13mp 5mp dual camera phones.
So it entirely depends upon your requirement.If you want a phone with all the features then it would be a little costly so fitting your budget go for a phone which fulfills your requirements.