@bobbydd since you asked a leading question, you will get answers which are obviously this or that. What you are looking for is a great sounding tube amp which has the bloom but not slow or colored. Check out Rogue Audio Stereo 100. It has everything that the Pass does well + warmth and naturalness, without any voicing. Both ARC & Mac are voiced. Rogue Stereo 100 and Apollo Monoblocks sound natural and unvoiced. They both have a triode/ultralinear switch. I always preferred the triode mode. Natural, harmonic, and transparent. Here is a review comparing Rogue Stereo 100 and Pass XA25
https://www.stereophile.com/content/rogue-audio-stereo-100-power-amplifier