+1. I just logged into WBF to ask this exact question (Dart vs. Colosseum)
OK Gents, here goes my very personal, non-scientific, personal opinion. No vitriole please...its Christmas!
I deeply, deeply respect the might DTZL and in fact, just heard the pre/amp again in the same room with Wilsons which i know very well, and with same source (Metronome Kalista). I also have heard the Momentums in the same room, stereo and mono with Wilsons and the same Metronome source.
DTZL pre/amp is exceptionally well executed across the board, neutral, balanced, very very extended and very very smooth. Execution is very high here.
compared to the Momentums:
- Momentums strike me as more muscled...it was designed by Dan D'Agostino...
- But the Momentums also have such finely threaded treble and ability to deliver musical notes/lines, it is basically the DTZL on speed
- I find it the most delicate SS muscle amp i have ever heard
- I found the monos 'shouted' a bit more than the stereo which also seemed a touch sweeter to me.
- 2 industry professionals who heard them in the same room were over at my place yesterday and commented the same
As for Gryphon, i would say the Colosseum is more muscled than all...subjective. It also delivers an intensity of tone and sweetness which leaves the DTZL behind...a very organic presentation whereas i find the DTZL extremely intellectual in its excellent approach, but not for me.
The Momentum is more its rival than DTZL imho, but i prefer Gryphon as i find it more full more full bodied. I could see some preferring Momentum due to its finely threaded treble...Gryphon definitely more full bodied here but in no way fat.
Overall...i find the Gryphon in its own class as someone who prefers power, incredibly nuanced microdynamic shadings and sweetness of tone, and density of notes...with fullness. I would say Momentum is thus next nearly matching all but not quite power, nor fulllness of notes. And DTZL is left behind as incredibly well executed but alas too intellectual an assembly of technical merits without as organic a delivery as Gryphon.
This is exceptionally personal and not scientific in any way. I have seriously considered DTZL and Momentums when i auditioned them, but for me I stick with Gryphon.