I've been having finger joint problems and I'm looking to upgrade to a keyboard which has an extra light touch so it won't further aggravate my join pain. Anyone have any suggestions? I'm not too concerned about the price as long as it's a good light touch keyboard. I own a first generation Mac Pro Tower and my operating system is 10.4.11 I know I should update my OS but due to my career, I have a program that is vital for my business that can only run smoothly on 10.411. Thanks for your help