I just purchased 6.0 with the PE4.0 bundle. Besides the fact that I am concerned about the current posts on muvipix about the issues with PE4 - I've already installed PE4 and wondering how to proceed if the program is going to have problems, but I guess time will tell.
As for Photoshop, it looks like under the Effects options, it will give you the name of the filter when you run your mouse over the effect. In 5.0, each of the effects had the title simply written underneath it, which I found it easier to find specific filters. Does anyone know if there's a way to adjust this?