DAC for entry level system


Hello,
I have an entry level system.
Speakers: Vienna acoustics Bach.
Plinius 8100 integrated amp.
Arcam CD72 player.
Logitech squeesbox touch.
I would like to buy a DAC to my system(prefer used to get more for the money), but I don’t know what price level of DAC will get me much better result compare to the internal DAC that I have now in the Arcam and the Logitec. Will(example of price groups) $179 HRT music steamer II will do it? Or $379 Musical fidelity V-DAC MKII, or $649 Simaudio 100D, or $995 Rega dac.
Thanks.
bedel
Had 3 of the DACS you list, HRT II, VDAC II and Rega. All were worthy performers. The best of those for me was probably the Rega. (I could not do head to head comparisons so take this with a grain of salt and from memory) You won't know which one is best in your setup until you hear it and compare to your current sound. Those 3 can be auditioned in your system and returned if they don't enhance the sound from your speakers.
Foster_9, thank you for your input. I guess there is no short cut here, and I need to start to audition different level of DACs in my system.
Take a look at the ODAC sold at JDS Labs. There are a number of reviews on it, especially in the headphone forums. For the hefty price of $150 you won't be disappointed.