For "musical involvement", on the preamp side, I like CJ tube preamps the most (ART and ACT2.2).
On the amp side, I have owned both Mac and CJ, and like the sound of both. It would depend on the speaker I was using.
My tastes in amps for the last 4-5 years has gravitated toward DHT (SET) "and" Pass's XA.5 series.