Now i have around 7000k ( 150$) to spare. I am in a dilemma about whether to buy an lcd monitor or go for a graphics card upgrade(nvidia 6600 gt beckons

I use the computer for long hours and am really worried about it screwing my eyes up. I have heard that lcd monitors reduce the strain to ur eyes very much and also go easy on the electric bill. I don't want to go for the lcd option if the eye strain issue for lcd monitors is more or less equal to CRT+radiation free glass thing(which i am currently using). But if i get a 17" lcd 4 that range i would anyway go for the monitor.
About what i do on the computer, it is essentially a lot of photoshop, flash and other graphics stuff. But i don't work much on any 3d applications. Also i am not an avid gamer. So wondering whether it would be worth it 4 me going for the graphics card.

Any suggestions...?