I like both the Cains and the new Omegas but you don't get that full fledged Orchestral sound as much with these fostex style full range drivers. The Cains even though they are much larger aren't as full sounding to me. You don't need even 35wpc for either of them. The Omegas sound big with single digit SETs. Try the new small model you will be amazed. Great tonal balance. I don't know the arcam very well.