Help on Purity Audio Design

Hi, I have both turntable and SACD player and want to upgrade system with Purity Ultra GT preamp. Now the problem comes either from the lack of info or my bad understanding of english: can Ultra GT be used both as a phono preamp and a SACD preamp? Or maybe I need this Harmony device (I actually didn't understand for 100% what it namely does because my English is not perfect I guess). Please explain what exactly I need and how connection scheme should look like.