I second Miker's suggestion. IMO Musical Fidelity and Dynaudio is a very good combination. I have tried the S1.4 speakers with quite a few amps (at the same time in the same room), e.g. NAD M3, Marantz PM-15, Cyrus separates, Primare, and Musical Fidelity A5 and X series separates. To me the combination with the Musical Fidelity amps was by far the best, i.e. very well balanced with good detail and bass and a very full midrange. The A5 amp will probably do a good job also when driving the C1s, but the C1s deserve better. The NuVista M3 amp suggested by Miker should do a great job.