[quote]Had my technology screwed up. The dot pitch is the space between the pixels, not the width of the pixels (or PPI, pixels per inch).
Incorrect, the dot pitch is the old CRT way of saying pixel pitch. The pitch is the width of the pixel itself in fractions of mm. The PPI is the number of pixels that fit across a length of one inch.
Here's a handy online tool that calculates the dimensions for you.
http://www.thirdculture.com/joel/shumi/computer/hardware/ppicalc.html
Actually, we are both wrong. Or both right depending on how you look at it. :P
The dot pitch is actually the distance from a point in one pixel to the same point in a similarly colored pixel (base rgb). Basically it's both the width of a pixel and the distance between them. I confirmed this using the tool you linked to and my own calculations. Here's a picture that explains it:
http://commons.wikimedia.org/wiki/Image:Dot_pitch.png
Edit: Ryom, thanks for the suggestion, but I wouldn't want to go over 24 inches. I'm basically bottlenecking at my FSB now and there's no money in the future for an upgrade.
Edit: Oh yeah, I had the numbers backwards on the monitors. The dell has the lower dot pitch.