I use the original standard one, which is very effective and cheap. I have noticed that that now have some with additive, which are also meant to be equally good. A little goes a long way.
One can spend an awful lot on moisturisers etc. but I believe that those in the know (I don't include myself in this group) swear by using the simple original creams, such as E45 and Vaseline. Some other creams that have also been mentioned are Diprobase and another by this manufacturer is called Double Base, which I believe is a slightly lighter preparation than Diprobase. Most of these creams are widely used within Dermatology circles.