Yes the Opus 7 and the higher end German sets are great radios. The Opus 7 is very close to the Opus 6. I think the only difference is the Opus 7 has five extra buttons below the 7 that tailor the sound abit more. Also I belive the Opus 6 only has one woffer and the Opus 7 has 2.
I've recapped both of my Opus 7's, and a similar Siemens and I listen to them nightly
