some high end cards, such as Asus Xonar, or Sound Blaster series, are really interesting .
they are usually optimised for gaming with plenty of features, not needed for music
I have an external sound blaster dac/amp, and it sounds good.
I see no reason, compared to entry level amps/dac, not to use high end internal sound card.
-Advantage of internal Card/entry level compared to dac/amp:
plugged to superior PCIe BUS, for heavy audio editing...