RANT: Wireless keyboard/mice and KVMs

I consult. My clients look to me to give recommendations that are simple, but above all reliable. Why isn't there a KVM solution out there that will work reliably with wireless keyboard and mice? I would think that with all the data that can be crammed onto electrical circuit boards these days, someone would come up with a kvm switch that has all the data it needs to handle any keyboard/mouse combination. I can understand if there are some extra buttons that may not function without extra steps or software. But we all know that there are many basic functions on a keyboard and mouse that are standard across all units (i.e. 104 keys on the keyboard, right/left click and scroll on a mouse).

I'm doing some work for a general contractor at his house. We're putting in a new machine, but keeping his old machine. Since both machines need to be functional and easily accessible via a single keyboard/mouse/display, I need to find a KVM solution. The display has DVI. They have a wireless keyboard/mouse set. I'm looking for a KVM solution that has DVI and USB capabilities.

Belkin makes one in their SOHO series. I've seen nothing but bad reviews. "Stay away!" is what I've been told on that one. Since I purchased that one while picking up a couple other things for them, I'm going to have to return it. I've tried KVMs from IOGEAR but haven't had much success with anything other than standard keyboard/mice and VGA display connections. Since I use a higher-end Avocent switch in my server room at the office, I checked them out. But, they've said that wireless keyboard/mice aren't supported.

In the end, I'm going to have to replace the current wireless keyboard/mouse with wired equivalents (keyboard needs to be ergonomic), use the VGA connection on the display, and go with a basic KVM. I'll probably go with a Microsoft Natural Ergonomic Keyboard 4000, standard USB optical mouse that came with the new machine, VGA connection from the display, and a yet-to-be-decided KVM (I haven't even addressed the fact that a printer needs to be shared and single audio would be nice too).