well if youre a 3dsmax owner youll enjoy v5I since max is one of the apps vue "prefers". Theres also a new max plugin called vue xStream comming out that will let you work with vue5Infinite inside of max using both apps perfectly merged together. As for v5I bruno sumarized it pretty nicely, except that vue is almost 1.5 years old by now (v5e anyway but esprit is built upon the core of v5I unless im misinformed) so you can probably expect v6 sometimes this year (could be wrong tho :P) anyway patches is being released with a regular intervall and new stuff is still being added to the application so vue5 is still getting better by the minute. Oh do i have to say that i realy enjoy working with vue :)