Well we moved her over to sand now, as all she wants to do is dig. She's a lot happier and active now too. I still have tiles on part of the tank though.
As for Vista, you get used to it..it's tough though. For companies, I try to stick with XP, as it is a lot easier to integrate with the server, especially when they are running the older version. I've got Vista on my home laptop, and have adjusted to it. There are some small things that drive me nuts, but I've pretty much tweaked it to my standards. It could be a lot worse...
Oh..and switching back to XP isn't hard, if you have the CD/serial. I upgraded my old laptop to Vista to test it out, then downgraded it to XP to sell it. You just have to make sure you format the drive, not just install over it.