The Suave HD Redone theme is one of the most popular themes for MIUI. Originally it was made for MIUI GB and was later ported to MIUI ICS. The theme has now been updated and is available in three versions: blue, lite and dark. The original author of the theme is XDA member Collins521 but now he is no longer working on it. However, the good news is that another guy named Lancelinksp has now taken the responsibility to develop this great theme further.
Anyways, here are the themes with direct download links. Download them all, or the one you prefer, and copy to MIUI/Theme folder on the internal SD Card of your device, then apply from MIUI theme manager.