*HELP PLEASE* --- DAC/interface for Macbook to KRK monitors

Looking for a budget DAC/interface for playback under £80ish that will significantly improve on the sound from my Macbook going into my KRK RP5 monitors...



Any thoughts on Mbox 2 Mini vs Lexicon Alpha vs Behringer U-Control UCA202?



Only interested in playback, don't need recording functionality etc.



Thanks!

*HELP PLEASE* --- DAC/interface for Macbook to KRK monitors