I went for the logitech K400, has a nice size track pad and additional left mouse button the left side of the keyboard so you can hold it a bit like a pad when using mouse.
http://www.amazon.co.uk/Logitech-K400-Wireless-Touch-Keyboard/dp/B005LDLQXG/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1380802692&sr=1-1-catcorr&keywords=k400







