The Samsing Galaxy S II is arguably Samsung's flagship handset at the moment. It's got Android 2.3, an 8 megapixel camera with LED flash (and a front facing secondary camera too), FM Radio, Bluetooth, GPS and a huge 4.3 inch Super AMOLED Plus capacitive touchscreen.
Even better, it's now available from only £16 a month after cashback from e2save (a subsidiary of Carphone Warehouse). For this bargain price you get 600 minutes, 500 texts and unlimited data on a 24 month contract - Although this includes 9 months cashback that you have to initially pay and then claim back.
This particular contract deal is on T-Mobile, but similar offers are also available on Orange.