I disagree, Viper mode is a very thin imitation of a few Vim commands. Slightly too thin for my liking, even on the most compatible of modes :p

Besides, to really experience the benefits of Emacs you have to dive right in. There are many Emacs features I wish Vim had but I fear many of these diminish in value when taken out of their natural environment. The reverse can also be argued to a lesser extent.