If you're day trading and at the computer all day, you may want to consider the affect on your eyes now and further on down the road. Of course, a flat panel is better than a CRT, but a digital flat panel is better than an analog.
I cut and paste now:
"Since CRT monitors require an analogue signal, video cards traditionally converted the computerâs digital information into an analogue signal. However, with the advent of digital LCD monitors this became unnecessary. LCD monitors that use the analogue 15 pin mini-D-sub (standard VGA monitor) connector are in effect turning a digital signal into analogue, then back into digital. As a result they suffer from phase jitter and need to be tweaked manually for the best result. All the LCD screens we looked at had 15-pin VGA connectors. Now that the Digital Display Working Group has ratified the DVI (Digital Video Interface) standard, DVI connectors are also becoming common. DVI allows the computer to deliver a digital signal directly to your monitor. This offers a much cleaner picture, but your video card must have a DVI output for this to work."
And,
"The analog format of the CRT is challenged by the digital capabilities of the LCD. And just as analog vs. digital still represents a battleground for audiophiles, so too does each technology have its proponents within the graphics community. But while many LCD monitors are configured to run in either analog or digital mode, it is only in digital where LCD monitors truly outshine CRTs."
And,
"An important detail to check when shopping for flat-panel displays is whether the interface is digital or analog. Since most computers are equipped to convert digital information to analog information for display on CRT monitors, LCD monitors have been built to convert the analog signal back to digital. This digital-to-analog-to-digital conversion results in some signal loss, and thus an imperfect picture. Choose a flat-panel monitor with a digital interface, if possible, though you will also need to purchase a special graphics adaptor."
And,
"Digital-ready video cards such as the nVidia GeForce4 and ATI Radeon will ensure that a digital LCD has enough support on the computer side. LCD flat panel monitors that will accept an analog signal may be more compatible with an older PC, but image quality will not be as crisp or accurate as a digital LCD image. With the added expense versus that of an analog CRT display, it is not cost efficient to compromise by using an LCD monitor and analog signals."
There are more articles, but suffice it to say, I chose the digital technology, even though it's a bit more, because I like my eyes.

I have 2-17" Dell 1702FP digitals on an ATI Radeon VE and the video is superb!