headphone amps

Match Ayre Codex with a top Sennheiser offering and be mesmerized. (Use the phones in balanced mode with top Cardas headphone cable.)

My preference is Class A / AB Amplification at the moment.
With Dynamic Drivers ... a good high quality set of cans.
Not having owned either brand. (Head Amp)
The two are likely very different. (PS/Burson)
Both very good quality.
Planar Drivers will be a different experience as well.