Agreed with much of the above, if you want a serious upgrade over the p363s, you will need to be prepared to spend some money. You say vocals are lacking in opera music, that sounds like a setup issue, because the p363s really shine in the mids, ie much of the vocal range you would expect to hear in opera. If you wanted a significant upgrade, I would be looking at the Wharfedale Jades, KEF LS50s, perhaps the Ascend Sierra 2s or Philharmonitors. All are $1500 speakers.