I would be cautious about purchasing a DAC that provides the detail you desire as there are other parts of your chain that you could make inroads on detail using a lot less dinero.
One, try a new set of tubes on your Freya. If you are using the stock JJ tubes, they will sound dry and unremarkable. They are meant to be stock tubes because of their ability TO NOT make changes to the sound - neutral - and certain tubes will impart more detail or your Maggies.
Secondly, wait until your room treatments are finished before bringing in a new component. Room treatments change the sound and you may find more detail because of it. With all those subs, you will need 4" panels to really tame the bass. You may want to make your own using Owens Corning 703 insulation.
Thirdly, your collection of subs may be creating voluminous bass sound that hides the detail you can get from your speakers. Throw a lot of bass into the room and you will lose high frequency response. DSP would be really helpful to help with your room corrections after treatment.
Depending on your source, if it is digital, you would gain detail by using a digital to digital converter. It cleans up your signal if it comes from a streamer or computer. A DAC creates the harmony, but the detail comes from your source.
A detailed DAC is what Benchmark provides as others have said. It may sound clinical, but because that may turn some people off, they are typically readily available in the used market. There is a 3B on US Audio mart as of now.

