No I have'nt heard the NAF, I think it is more expensive than the Solista and the Mastersound, cheaper. All are from Italy, 845 SET's and have a good rep. They all appear at times on the Gon. Be careful imprting and changing voltage. I bought mine in the US and changed it easily to European 220 volts, but it was too much for UK 240volts, After blowing capacitors and tubes, it had to return to Italy for new transformers, costly.