I used my magni 3 with the lcd2c for around 8 months before getting a thx 789. They pair ok and the differences between the 789 aren’t as pronounced compared to other cans, but there are some weaknesses there.
1) I would sometimes listen loud, but and at around 3 o’clock on the magni 3 with high gain there is audible distortion. It’s not full blown clipping, but it does feel compressed compared to the thx 789.
2) It’s hard to explain, but the thx 789 gives a quiter backdrop to the music. Almost like there’s less hiss, but not by a whole lot. I heard this was also the case with the magni 3 compared to the jds atom.
3) There is fuller bass with the thx 789, and when you consider that the magni 3 provides the most power between the 3, it could be an issue if you play at higher volumes, which imo the lcd2c needs to shine.
4) The magni 3 has NO short protection for the headphone jack. A partially inserted headphone can literally melt the op amps in the magni 3. I don’t know about the other two. This was a big no no for me with kids around.
Overall, the differences weren’t huge, but if you can save up, something with more clean power would be my recommendation.
Thanks so much for your input, interesting to note. This isn't the first time I've read about the magni3 feeling compressed. THX is it if my budget at the moment, but the new Asgard 3 also looks intriguing and is not that pricy. Atom sounds like a safe bet too