The tube stage is the thing I agree with the Freya, the reason for being. I put some CBS Hytron tubes in the input stage side and it really made the preamp a whole lot better. I wonder how it would compare to an expensive preamp. I was really thinking hard about trying something like a high end VAC or even Rogue RP 9 or CJ maybe but all the accolades I keep reading about the Freya and even from users that haven't experienced how much better it can sound with better tubes makes me think it might not be worth the bother.