Pro vs Non-Pro Top End

[Confused]

I've been doing much listening to my little Pro this morning. First some Herbie Hancock, which was great fun, it is clearly not the best recording ever, but getting over that philological hurdle, it did sound very enjoyable, if not showing the system in it's best light, but there is still some magic, the dynamics are great, and the insight into the instruments is extraordinary, good fun too! Next up, some Yello, this was a much better recording and suddenly the system is sounding epic! Whatever the shortcomings were with Herbie, these have now gone, just by selecting a different album. I'm now listening to the Who, and in a great irony for this thread, it sounds like the mix does not have enough treble!