Before you spend a zillion dollars replacing the Salon 2s you might consider analyzing your system. I highly recommend a Dayton Audio OmniMic set-up from Parts Express. It'll run on any PC. You might find that you have a big suck-out in the 500Hz-2KHz range, which might explain your problem with vocals. It could just be that you need to adjust your speaker placement for room modes. Even if you end up getting a different speaker the OmniMic is a great tool for system set-up, so IMO you can't go wrong. Yeah, it's about $300, but compared to $15K speakers it's a nit.
A couple other questions:
Do you listen to the Salon2s with the grilles on or off? Have you tried both?
Have you tried adjusting the controls in the cable connection box?
A couple other questions:
Do you listen to the Salon2s with the grilles on or off? Have you tried both?
Have you tried adjusting the controls in the cable connection box?