I am going for Ultimate Premium Platinum edition.
edit: no it doesn't exist, but you should really check which version you need.
Do you really need Ultimate over Home Premum?
Windows Vista Home Basic Edition
- Equivalent to XP Home
-Includes firewall, parental controls, Security Center, Movie Maker, Photo Library and more
-For first time buyer / budget conscious
Windows Vista Home Premium Edition
- Everything from Vista Home Basic
- Adds DVD video authoring, HDTV support, DVD ripping support
- Similar to current XP Media Center edition but with added features
Windows Vista Ultimate Edition
- "The best operating system ever offered for a personal PC"
- Superset of both Vista Home Premium and Vista Pro Edition
- Podcasting application, Game Performance Tweaker, possible free music/movie downloads
Not the best comparison, but I am basically wanting media center and domain support, seems there is only one solution 🙂