Sony Ericsson K800i Cyber Shot Black Vodafone PAYG £59.95 (when you buy £10 airtime credit and free delivery)
Just type DVCOUK5 in "Enter Promotional Code" and update. This would give you an immediate 5% discount. Package price of £66.95!
To me this phone is one of the top five as this is well balanced in terms of features, performance and durability.