The idea that CRT's give off harmful radiation is pretty much a myth. The only way to be exposed to radiation would be to put your head beside the back of the monitor, next to the electron gun, and hold it there for hours and hours. Since most people sit on the other side it isn't much of an issue.
I read a really good article recently that talked about that in detail, including the science behind it. I think it was over at x-bit labs.
For gaming, no LCD can quite match a normal CRT. For an LCD to have no ghosting at all, it would need to be 4ms (true 4ms, not the way manufactures claim their current specs). The fastest LCD's at the moment are 8ms, but even that is kinda false.
That said, LCD's are pretty cool. I'm not a hard core gamer, but I do play a few games and LCD's are okay. Basically, there is no perfect LCD that can do everything. Some are okay for gaming, most are fine for desktop, few are okay for graphics work, but all are nice and small.