With all due respect to Albert... I'd stick with SS on the C4s. I'm sure there are a few high powered tube amps to drive them, but as others have noted, it will require a lot of tubes, and will put off a lot of heat.
I'd look into a higher powered SS amp. The Harmonic cables should be fine. I'd say high current, with 500WPC into 4 ohms for these.
How big is your room? I hope those C4s have some breathing space, because they open up with current.
I had the Plinius 102 on a pair of Dyn S1.4s, which was a great match. The Plinius sound complements Dyns well, so you could look into a used 250. Also, I'd consider McIntosh, Sim, and the JC-1 as mentioned above.
I'd look into a higher powered SS amp. The Harmonic cables should be fine. I'd say high current, with 500WPC into 4 ohms for these.
How big is your room? I hope those C4s have some breathing space, because they open up with current.
I had the Plinius 102 on a pair of Dyn S1.4s, which was a great match. The Plinius sound complements Dyns well, so you could look into a used 250. Also, I'd consider McIntosh, Sim, and the JC-1 as mentioned above.