Our personal experence with these guys is really good. They ship very quickly and offer free shipping. They have a good selection and the website has a great focus on smartphones, rather than a mix of everything like some websites.
These guys are also really quick at adding Android Phones to their catalogue, and ususally have the ‘pre-order’ deals just after a new phone has been announced (Elephone often do this, and you can get some serious power for a low price)
They have some smartphone exclusive offers and once again worldwide free shipping. The website is quite nice to use and they also have a load of weird tech if you’re into that kind of thing!