4:3 5:4 picture on 1680* 1050 res monitor

Hello, I'm going to buy a stationary computer in the near future. As I like to play some older games that lackes the suport of wide screen picture, I thougt that i'd go for a monitor with normal wide hight relation. However I just resently picked up that there are widescreen monitors like the: Samsung 2032BW and the Lg l222ws-sn which can show 5:4 and 4:3 material withoute rescaling it. This seems to be a good solution as you get 3 monitors in one so to speak. I have a couple of questions about this:

1) Can the screen take damage from showing a picture with black borders for a long period of time?


2) Is it a worse strain for the eyes to wath a picture with black borders instead of a full screen picture?


3) Can demanding games like Crysis that probably will be hard to run in 1680*1050 res take benefitte from lowering the res to 1280* 1024 when it comes to framerate that is?


4) Does a 20 " screen with the same amount of pixels as a 22" screen give a more "densed" and therefore clearer picture than the 22"? Some say that the 22" is easyer on the eyes so to speak?

Im wery thankful if someone with experiense from these monitors can giwe some help regarding these issues.
P.S. I appologuise for any bad spelling or wrong using of terms as english is't my first language.
Pizzicato/Sweden