Wanted: A KVM switch that does it all

[PenaltyShot]

This particular animal does not seem to exist...a 4-port KVM switch that has:

Shared components:
DVI @ 1920 x 1200
Speakers (at least 2.1)
USB mouse
USB keyboard
Printer

Ports for each of the four PCs:
DVI @ 1920 x 1200
VGA too (at least for ONE of the four PCs. Doesn't have to be DVI + VGA for all four)
Audio inputs
USB mouse
USB keyboard


Needs to support both Mac and PC.

Also needs to be zero or near-zero degradation of video quality and mouse/keyboard response times.

On Newegg, I see devices that have most of the components but miss other critical ones. Nothing that has everything I need. Anybody seen something that would at least come 95% close to my spec requirements?

Thanks.