I am looking to get a KVM for my two PowerMac G4's. Can someone reccomend a good one that works with Macs because the one that I wanted to get from the Apple site had a reviewer saying that it didnt work too well under Tiger. I want to get one that will share my speakers also. Any suggestions/comments?

EDIT: I forgot to mention that I will probably be getting an iMac G5 and will be using that in the same area that the PowerMacs are in. I know that I wont be able to use the iMacs monitor for the PowerMacs but I was wondering if I would be able to use all three of them with the same keyboard,mouse,monitor and speakers.