Digital -The next step

Hi All

Would like some advice experience as regards my next step regarding my digital upgrade.The choice currently is between. Esoteric DV50s or the Accustic Arts Dac MK4.
The current rig is Eikos precision CDP used as a Transport and a Lector DAC.
The current sound is musical put is lacking in a number of area's. The bass presention doestn't have the pitch and definition or extension. Also the depth of the soundstage is curtailed.

Which is the best option ditch the transport-Dac for the DV50s or will the AA Dac deliver what i require.

Thanks for looking.

Meth.