You might want to look into switching distributions
Obviously lots of threads on here to look at, but also a website I would recommend..
That will show you the "major" distributions, based on popularity, stability, downloads, support, etc. Also, when you take a look at the (huge) list of distributions on that site, you may realize that a distribution can suite exactly what you want and the hardware you want. If you would like aid in selecting a GUI/Desktop Manager and distribution type, it would be most helpful if you could post your hardware specs here. KDE and even Gnome3 may be a bit "heavy" and slow depending on your system, and no one likes bad performance.