I recently took advantage of the current low pricing on Sennheiser HD600 (£120). Please don't give me opinions on these unless they are good - I've already bought them! What are people's thoughts on headphone amps? The only two (reasonably (?) priced) that I can find available are the Musical Fidelity X-Can v2 and the EarMax Pros. Are they much better than using the headphone socket of a normal stereo amp (say my Arcam Diva A85 when it comes back from its software upgrade)? Would the EarMax sound over twice as good for over twice the price? (That eternal hi-fi question again! ) Thanks, Charles.