I use dual Dell 24" model number 2408WFP at work and they're great.

It has PIP capability, you can hook up hdmi, vga, dvi, component.

The only thing I don't like is that I feel like they should be able to raise a little higher than they do.

link here:
http://www.dell.com/content/products/productdetails.aspx/monitor_2408wfp?c=us&l=en&s=dfo

-David