You will always get the most bang for your buck by upgrading the speakers. I do not know very much about the particular speakers you have so I don't know if the upgrade is worthwhile. The differences in dac's, especially when you get into the pricier models is not as great as the reviewers would have you believe.
Case in point, I have a Wyred dac with my laptop running through it and the dac in my Esoteric cd player. The sound of the dac's are very close, even though the Wyred uses a ESS dac and the Esoteric uses a Burr Brown dac. I just don't see that replacing the dac will give you a big difference.
Case in point, I have a Wyred dac with my laptop running through it and the dac in my Esoteric cd player. The sound of the dac's are very close, even though the Wyred uses a ESS dac and the Esoteric uses a Burr Brown dac. I just don't see that replacing the dac will give you a big difference.