Believe it or not I second Blue Circle. Beautiful to look at, great tonality, nice punch. Nothing is the same as Naim, but BC will give you a good alternative and, as I understand it, that is what you're asking for.
Moving to tubes, nothing I've auditioned does what Naim does, but tube amplification can do some cool things. Little noisy but spooky real.
Moving to tubes, nothing I've auditioned does what Naim does, but tube amplification can do some cool things. Little noisy but spooky real.