Dude, get some new glasses! You honestly can't tell the difference between 32bit and 16bit? Are you sure that your comparing the two in GAMES and not your desktop. It's a little hard to tell when ur looking at still photos on a computer, but you CAN see a difference. Anyhow, run DeusEx with 16bit color then try 32bit. That's one game that SUCKS in 16bit color.
-MP Jesse