The lack of uniformity of the pgup print screen arrows etc is getting on my nerves. I am wondering if any of the laser keyboards would make me a more efficient keyboarder by allowing me to adjust those keys and make fewer mistakes in programs, emails, and administrative tasks.
I think you are stating that you'd like to go from a physical keyboard to a laser keyboard to improve your typing skills. As well, the only laser keyboard I have experience with had an odd layout that completley lacked the "pgup print screen arrows etc" which you complained about being non-standard, as well as having keys squished into a trapezoid.
I believe you will find it impossible to touch type on a laser keyboard. Typing requires tactile feedback to know where your fingers are at all times.
A better solution to your problem is probably to pick a standard keyboard layout and use it everywhere you can. Personally, I use upwards of four different keyboard daily, but they are all almost the same. My pet peeve with keyboards is the location of the \ key which tends to move around.
I like to use vi-style keybindings, so I wouldn't miss the keys outside of the main "block" of keys on a standard 101 keyboard.