Sounds like you have G.A.S. for the sake of G.A.S. Grace is a good company, feel free to stick with that...unless you feel like you're actually missing something. And in that case, you may want to make sure there's impedance matching between components.
Other than the Schiit line of gear, I don't know what DACses are popular any more. (I don't have one, myself, though, so it might just be that they have a memorable name.)