Hi,
Thinking of buying a Schiit stack. Would Asgard 3 with multibit card be clearly better than Modi 3 + Magni 3? The price-difference is not that huge in Europe. I'm just a bit reserved after reading about how hot the a3 gets with the built in card and that the external Modi performes better than the internal (according to some).
I wouldn’t worry about the temperature, Magni3 also gets quite warm. Even the Lyr3 doesn’t get very hot (except for the tube itself), on my Lyr3 I have just over 40°C on the top chassis. I doubt the Asgard3 would be warmer than Lyr3.
Compared to the Magni3, the Asgard3 is certainly the more capable amp, class A-ish with the Continuity output stage, as compared to class AB for Magni3. I can’t offer any sonic comparison though, as I haven’t listened to the Asgard3 much yet. Anyway, with the card, Asgard3 has one USB and one RCA input, while Magni3 only has one RCA input. However, the Modi also offers optical and coax inputs in addition to USB, which Asgard3 with card does not. On the sonic side, Modi might have a slight advantage by being in its separate enclosure, but both the Modi and the card use the same tech, so I think the difference would be subtle, at most, if there is any at all.
Moreover, Asgard3 with card is a one-box solution with one standard power cord. Modi+Magni make a nice stack, but use one wall wart each, and don’t forget the RCA interconnects.
I would go with the Asgard3 and card, but that’s just me