Budget? Preference to size? Need DVI, speakers? Preferred resolution? This is where you need to take the capabilities of your graphics card in mind. If it can render your games at 1440x900 or 1680x1050 fine, then no worries. LCD's prefer to play at their native resolution if at all possible.
As far as ghosting is concerned, look for specs with a response time of around 2-4ms. Lower is always better. 8ms is par, and you may experience ghosting.
Newegg power search - widescreen LCD with response time below 8ms