Not many people have heard both (I have not heard the Amber myself and only once heard the Big5), but I would imagine that the L5 DSD would be better, given its "chipless" engine.
Amber Dac is based on Sabre chip. Apparently sounds great, but its DSD is not like the regular Lampi models
However, if balanced topology is important to you (due to teh rest of your system being FULLY balanced), perhaps the Amber is the way to go. You can always change out the Caps yourself in the L5, so if the price is right, then it would pay to do so yourself.
Amber Dac is based on Sabre chip. Apparently sounds great, but its DSD is not like the regular Lampi models
However, if balanced topology is important to you (due to teh rest of your system being FULLY balanced), perhaps the Amber is the way to go. You can always change out the Caps yourself in the L5, so if the price is right, then it would pay to do so yourself.