Quote Originally Posted by sabersmith View Post
Well I don't plan to use a KVM switch. I'm just going to use two keyboards; one main and another mini if i need to use the other computer.
That will work. Setting up Input Director is pretty darn simple, and once you do that, it makes the second PC almost like another monitor on your main in that you can just move the mouse over to it and control everything with the same keyboard/mouse (no moving hands while in the middle of combat, etc.).

Quote Originally Posted by sabersmith View Post
Both computers are towers and they'll be in the same room attached to the same router. the router is actually behind another router, but that shouldn't be a problem should it? the router is fully configurable.
Yep, that'll work fine.

Quote Originally Posted by sabersmith View Post
The monitors are different sizes, aspect ratios & resolutions. one is 27" 1080p (1920x1080) the other is 19" 1280x1024. That might make hardware cloning a bit of an issue since moving the mouse on one will not result in the same result on the other. e.g. targeting a creature. will software do this better? What are the tricks people use, or am I just better off buying another 1080p screen?
Monitor size won't matter. Mouse click broadcasting is dependent on the resolution you run the game, not the monitor. Some do this better than others. If you want more info on the differences, let me know and I'll explain a bit further. Suffice it to say the monitor/PC hardware won't matter for this feature.

Quote Originally Posted by sabersmith View Post
If software works better I'll go that route. I can see it having less lag sending commands over ethernet. i also like the ability to customize which commands it sends on which key-presses. a little more control than simply cloning keystrokes. However, the game will probably have a macro system that will let me do the same thing with cloned keystrokes so I'm not sure how valuable it will be. Will have to wait and see.
The nice thing about the KM software is being able to use the same keyboard/mouse, not having to move your hands around, etc. It definitely isn't needed if you have a second keyboard, so it just depends on your setup. You can always add it later on for free if you decide using a separate keyboard/mouse isn't as nice as you thought it would be.