I am not a professional. I have always used Pro-Arte Pro Normal on my classical guitar. I tried Savarez 520R and am amazed at the difference. I am sure others can think of all manner of criticisms, but all I can say is that everything I play sounds better and is easier to play with Savarez. I don't care about the price. The change and benefits are simply remarkable. It is hard for novices to find good advice online becuase all the advice is geared to experienced players. My advice to novices like me, try the Savarez strings. You'll grow to love the feel of the strings and the sound.
Santa Barbara, CA