The question is now whether to buy the "Power Pack
If you are just "trying" Linux, the regular or personal versions are just fine. They will have most of the applications you will want to try. If having Star Office or Open Office available on the CD is important to you, check for it.
Unless you know there are applications or documentation you want in the more expensive version I would recommend the cheaper version for a test drive. You can always pick up the full pack at the next version change. And in the mean time, most will be available for download.
If you won't miss the money though, go for it.