I got news for you:
THAT'S NOT AN UPGRADE.
Reason: An upgrade, by definition, is moving to something BETTER.
No LCD monitor is BETTER than a 21" Sony CRT monitor. It may be brighter, it may be lighter,
it may use less desk space, but when it comes to the only thing that a monitor should be judged on,
which is PICTURE QUALITY, the LCD monitor is the BIG LOSER.
You will see this once the novelty of your new monitor wears off and you start having to deal with
its shortcomings on a daily basis.
There's ONE optimal resolution for any fixed pixel display. CRT monitors have the flexibility to
handle a wide range of display resolutions and every one of them looks good, without aliasing,
jaggies, or any other such garbage that's a sure consequence of trying to run a fixed pixel monitor
at the wrong resolution.
I use TWO 21" Sony CRT monitors, a high end version made for Sun Microsystems. The ONLY
monitors I'd ever want to trade them in on would be the 24" widescreen (16x10 aspect ratio)
Sun/Sony monitors that are basically the same thing I have now but in the widescreen format.
I run my desktop resolutions as high as QXGA (2048x1536) and everything is totally readable
and utterly crisp at that level. Just try to FIND a single LCD monitor that even ACCEPTS that resolution, much less displays it at its native resolution!
Keep your CRT monitor because it is simply a far superior display device, PERIOD.
Newer ain't always better.