You've got 3 options really: Dextop, Deskspace and CubeDesktop. all of them are crap compared to Compiz in linux but we arne't in linux so all we can do is cry for what is lost and use waht we can. For functinality and making your life more efficient Dextop is the winner, for pretty bling Deskspace wins. I'd rather be more efficient at what I do than prettier so I'm using Dextop.. Plus it's free!
I've written a whole review here comparing the 3: http://blog.netflowdevelopments.com/2012/09/19/3d-desktop-cube-reviews-and-comparisons-windows/